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7995486989 = 76421177887
BaseRepresentation
bin1110111001001000…
…10111001100001101
3202122012220211012202
413130210113030031
5112333321040424
63401215011245
7402064342460
oct73444271415
922565824182
107995486989
113433275796
121671809b25
139a5622bb9
1455bc512d7
1531be082ae
hex1dc91730d

7995486989 has 8 divisors (see below), whose sum is σ = 9139173888. Its totient is φ = 6852168720.

The previous prime is 7995486943. The next prime is 7995487001. The reversal of 7995486989 is 9896845997.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-7995486989 is a prime.

It is a super-2 number, since 2×79954869892 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7995486929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43997 + ... + 133890.

It is an arithmetic number, because the mean of its divisors is an integer number (1142396736).

Almost surely, 27995486989 is an apocalyptic number.

It is an amenable number.

7995486989 is a deficient number, since it is larger than the sum of its proper divisors (1143686899).

7995486989 is a wasteful number, since it uses less digits than its factorization.

7995486989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184315.

The product of its digits is 352719360, while the sum is 74.

The square root of 7995486989 is about 89417.4870425243. The cubic root of 7995486989 is about 1999.6238450081.

The spelling of 7995486989 in words is "seven billion, nine hundred ninety-five million, four hundred eighty-six thousand, nine hundred eighty-nine".

Divisors: 1 7 6421 44947 177887 1245209 1142212427 7995486989