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999999969999999 = 319739118719999999
BaseRepresentation
bin1110001101011111101010001…
…0111111001011110001111111
311212010201001201021201010120220
43203113322202333023301333
52022032444414304444444
613502453351052312423
7420430420323214113
oct34327724277136177
94763631637633526
10999999969999999
1126a6a3673135151
12941a683a772713
1333bca791a826a7
14138d2384907743
157a92462872619
hex38d7ea2fcbc7f

999999969999999 has 32 divisors (see below), whose sum is σ = 1406592000000000. Its totient is φ = 630192896980704.

The previous prime is 999999969999949. The next prime is 999999970000007.

999999969999999 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 999999969999999 - 29 = 999999969999487 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 999999969999999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999999969999949) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40000002 + ... + 60000000.

It is an arithmetic number, because the mean of its divisors is an integer number (43956000000000).

Almost surely, 2999999969999999 is an apocalyptic number.

999999969999999 is a deficient number, since it is larger than the sum of its proper divisors (406592030000001).

999999969999999 is a wasteful number, since it uses less digits than its factorization.

999999969999999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20001947.

The product of its digits is 137260754729766, while the sum is 132.

The spelling of 999999969999999 in words is "nine hundred ninety-nine trillion, nine hundred ninety-nine billion, nine hundred sixty-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".

Divisors: 1 3 19 57 739 1187 2217 3561 14041 22553 42123 67659 877193 2631579 16666667 19999999 50000001 59999997 379999981 1139999943 14779999261 23739998813 44339997783 71219996439 280819985959 451059977447 842459957877 1353179932341 17543859122807 52631577368421 333333323333333 999999969999999