77317255256 has 32 divisors (see below), whose sum is σ = 152929574400. Its totient is φ = 36544828320.

The previous prime is 77317255247. The next prime is 77317255271. The reversal of 77317255256 is 65255271377.

It is a congruent number.

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, 478940 + ... + 619691.

It is an arithmetic number, because the mean of its divisors is an integer number (4779049200).

Almost surely, 2^77317255256 is an apocalyptic number.

77317255256 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

77317255256 is a deficient number, since it is larger than the sum of its proper divisors (75612319144).

77317255256 is a wasteful number, since it uses less digits than its factorization.

77317255256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099119 (or 1099115 counting only the distinct ones).

The product of its digits is 3087000, while the sum is 50.

The spelling of 77317255256 in words is "seventy-seven billion, three hundred seventeen million, two hundred fifty-five thousand, two hundred fifty-six".