77857186233812 has 48 divisors (see below), whose sum is σ = 142549526125440. Its totient is φ = 37137810306432.

The previous prime is 77857186233803. The next prime is 77857186233851. The reversal of 77857186233812 is 21833268175877.

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, 57055958 + ... + 58404594.

It is an arithmetic number, because the mean of its divisors is an integer number (2969781794280).

Almost surely, 2^{77857186233812} is an apocalyptic number.

It is an amenable number.

77857186233812 is a deficient number, since it is larger than the sum of its proper divisors (64692339891628).

77857186233812 is a wasteful number, since it uses less digits than its factorization.

77857186233812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1350320 (or 1350318 counting only the distinct ones).

The product of its digits is 189665280, while the sum is 68.

The spelling of 77857186233812 in words is "seventy-seven trillion, eight hundred fifty-seven billion, one hundred eighty-six million, two hundred thirty-three thousand, eight hundred twelve".