77764368784 has 40 divisors (see below), whose sum is σ = 152197411520. Its totient is φ = 38488307328.

The previous prime is 77764368763. The next prime is 77764368839. The reversal of 77764368784 is 48786346777.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1832899 + ... + 1874845.

It is an arithmetic number, because the mean of its divisors is an integer number (3804935288).

Almost surely, 2^77764368784 is an apocalyptic number.

It is an amenable number.

77764368784 is a deficient number, since it is larger than the sum of its proper divisors (74433042736).

77764368784 is a wasteful number, since it uses less digits than its factorization.

77764368784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43127 (or 43121 counting only the distinct ones).

The product of its digits is 265531392, while the sum is 67.

The spelling of 77764368784 in words is "seventy-seven billion, seven hundred sixty-four million, three hundred sixty-eight thousand, seven hundred eighty-four".