77955256 has 8 divisors (see below), whose sum is σ = 146166120. Its totient is φ = 38977624.

The previous prime is 77955253. The next prime is 77955299. The reversal of 77955256 is 65255977.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77955253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4872196 + ... + 4872211.

It is an arithmetic number, because the mean of its divisors is an integer number (18270765).

Almost surely, 2^77955256 is an apocalyptic number.

It is an amenable number.

77955256 is a deficient number, since it is larger than the sum of its proper divisors (68210864).

77955256 is a wasteful number, since it uses less digits than its factorization.

77955256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9744413 (or 9744409 counting only the distinct ones).

The product of its digits is 661500, while the sum is 46.

The square root of 77955256 is about 8829.2273727660. The cubic root of 77955256 is about 427.1841534659.

The spelling of 77955256 in words is "seventy-seven million, nine hundred fifty-five thousand, two hundred fifty-six".