76778798636 has 12 divisors (see below), whose sum is σ = 134372427000. Its totient is φ = 38386676640.

The previous prime is 76778798617. The next prime is 76778798639. The reversal of 76778798636 is 63689787767.

It is not an unprimeable number, because it can be changed into a prime (76778798639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 616550 + ... + 730541.

It is an arithmetic number, because the mean of its divisors is an integer number (11197702250).

Almost surely, 2^76778798636 is an apocalyptic number.

It is an amenable number.

76778798636 is a deficient number, since it is larger than the sum of its proper divisors (57593628364).

76778798636 is a wasteful number, since it uses less digits than its factorization.

76778798636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361344 (or 1361342 counting only the distinct ones).

The product of its digits is 896168448, while the sum is 74.

The spelling of 76778798636 in words is "seventy-six billion, seven hundred seventy-eight million, seven hundred ninety-eight thousand, six hundred thirty-six".