77980942695 has 16 divisors (see below), whose sum is σ = 124895434752. Its totient is φ = 41547860640.

The previous prime is 77980942681. The next prime is 77980942703. The reversal of 77980942695 is 59624908977.

It is not a de Polignac number, because 77980942695 - 2¹² = 77980938599 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2608107 + ... + 2637836.

It is an arithmetic number, because the mean of its divisors is an integer number (7805964672).

Almost surely, 2^77980942695 is an apocalyptic number.

77980942695 is a deficient number, since it is larger than the sum of its proper divisors (46914492057).

77980942695 is a wasteful number, since it uses less digits than its factorization.

77980942695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5246942.

The product of its (nonzero) digits is 68584320, while the sum is 66.

The spelling of 77980942695 in words is "seventy-seven billion, nine hundred eighty million, nine hundred forty-two thousand, six hundred ninety-five".