77760476631 has 16 divisors (see below), whose sum is σ = 118010481120. Its totient is φ = 50575919040.

The previous prime is 77760476627. The next prime is 77760476659. The reversal of 77760476631 is 13667406777.

77760476631 is a `hidden beast` number, since 77 + 76 + 0 + 476 + 6 + 31 = 666.

It is not a de Polignac number, because 77760476631 - 2² = 77760476627 is a prime.

It is a super-2 number, since 2×77760476631² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77760476621) 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, 35121060 + ... + 35123273.

It is an arithmetic number, because the mean of its divisors is an integer number (7375655070).

Almost surely, 2^77760476631 is an apocalyptic number.

77760476631 is a deficient number, since it is larger than the sum of its proper divisors (40250004489).

77760476631 is a wasteful number, since it uses less digits than its factorization.

77760476631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70244383 (or 70244377 counting only the distinct ones).

The product of its (nonzero) digits is 6223392, while the sum is 54.

The spelling of 77760476631 in words is "seventy-seven billion, seven hundred sixty million, four hundred seventy-six thousand, six hundred thirty-one".