76639405965 has 16 divisors (see below), whose sum is σ = 122666616000. Its totient is φ = 40859827712.

The previous prime is 76639405961. The next prime is 76639406027. The reversal of 76639405965 is 56950493667.

It is a cyclic number.

It is not a de Polignac number, because 76639405965 - 2² = 76639405961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 76639405899 and 76639405908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76639405961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 863940 + ... + 948509.

It is an arithmetic number, because the mean of its divisors is an integer number (7666663500).

Almost surely, 2^76639405965 is an apocalyptic number.

It is an amenable number.

76639405965 is a deficient number, since it is larger than the sum of its proper divisors (46027210035).

76639405965 is a wasteful number, since it uses less digits than its factorization.

76639405965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1815276.

The product of its (nonzero) digits is 36741600, while the sum is 60.

The spelling of 76639405965 in words is "seventy-six billion, six hundred thirty-nine million, four hundred five thousand, nine hundred sixty-five".