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40788015669 = 34661761809
BaseRepresentation
bin100101111111001001…
…111011101000110101
310220021120211212210000
4211333021323220311
51132013213000134
630423204421513
72642523261402
oct457711735065
9126246755700
1040788015669
1116330853965
127aa39a7899
133b003ca61b
141d8d0d72a9
1510dac92e99
hex97f27ba35

40788015669 has 20 divisors (see below), whose sum is σ = 61022504620. Its totient is φ = 27150837120.

The previous prime is 40788015617. The next prime is 40788015707. The reversal of 40788015669 is 96651088704.

40788015669 is a `hidden beast` number, since 4 + 0 + 78 + 8 + 0 + 1 + 566 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 16348946769 + 24439068900 = 127863^2 + 156330^2 .

It is not a de Polignac number, because 40788015669 - 28 = 40788015413 is a prime.

It is a super-2 number, since 2×407880156692 (a number of 22 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 (40788015869) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 327364 + ... + 434445.

It is an arithmetic number, because the mean of its divisors is an integer number (3051125231).

Almost surely, 240788015669 is an apocalyptic number.

It is an amenable number.

40788015669 is a deficient number, since it is larger than the sum of its proper divisors (20234488951).

40788015669 is an equidigital number, since it uses as much as digits as its factorization.

40788015669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762482 (or 762473 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 40788015669 in words is "forty billion, seven hundred eighty-eight million, fifteen thousand, six hundred sixty-nine".

Divisors: 1 3 9 27 81 661 1983 5949 17847 53541 761809 2285427 6856281 20568843 61706529 503555749 1510667247 4532001741 13596005223 40788015669