77255855156 has 48 divisors (see below), whose sum is σ = 145306224000. Its totient is φ = 35809213440.

The previous prime is 77255855123. The next prime is 77255855239. The reversal of 77255855156 is 65155855277.

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, 5414720 + ... + 5428968.

It is an arithmetic number, because the mean of its divisors is an integer number (3027213000).

Almost surely, 2^77255855156 is an apocalyptic number.

It is an amenable number.

77255855156 is a deficient number, since it is larger than the sum of its proper divisors (68050368844).

77255855156 is a wasteful number, since it uses less digits than its factorization.

77255855156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15464 (or 15462 counting only the distinct ones).

The product of its digits is 14700000, while the sum is 56.

The spelling of 77255855156 in words is "seventy-seven billion, two hundred fifty-five million, eight hundred fifty-five thousand, one hundred fifty-six".