77947783746 has 64 divisors (see below), whose sum is σ = 192612357120. Its totient is φ = 20528406720.

The previous prime is 77947783687. The next prime is 77947783757. The reversal of 77947783746 is 64738774977.

It is a Smith number, since the sum of its digits (69) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1290460 + ... + 1349511.

It is an arithmetic number, because the mean of its divisors is an integer number (3009568080).

Almost surely, 2^77947783746 is an apocalyptic number.

77947783746 is an abundant number, since it is smaller than the sum of its proper divisors (114664573374).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77947783746 is a wasteful number, since it uses less digits than its factorization.

77947783746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2640039.

The product of its digits is 348509952, while the sum is 69.

The spelling of 77947783746 in words is "seventy-seven billion, nine hundred forty-seven million, seven hundred eighty-three thousand, seven hundred forty-six".