77313255025 has 24 divisors (see below), whose sum is σ = 98183306144. Its totient is φ = 60359644800.

The previous prime is 77313255017. The next prime is 77313255029. The reversal of 77313255025 is 52055231377.

It is not a de Polignac number, because 77313255025 - 2³ = 77313255017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77313255029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1228117 + ... + 1289533.

Almost surely, 2^77313255025 is an apocalyptic number.

It is an amenable number.

77313255025 is a deficient number, since it is larger than the sum of its proper divisors (20870051119).

77313255025 is a wasteful number, since it uses less digits than its factorization.

77313255025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62641 (or 62636 counting only the distinct ones).

The product of its (nonzero) digits is 220500, while the sum is 40.

The spelling of 77313255025 in words is "seventy-seven billion, three hundred thirteen million, two hundred fifty-five thousand, twenty-five".