77122001656 has 64 divisors (see below), whose sum is σ = 165786264000. Its totient is φ = 32947510272.

The previous prime is 77122001647. The next prime is 77122001657. The reversal of 77122001656 is 65610022177.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77122001657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32719230 + ... + 32721586.

It is an arithmetic number, because the mean of its divisors is an integer number (2590410375).

Almost surely, 2^77122001656 is an apocalyptic number.

It is an amenable number.

77122001656 is an abundant number, since it is smaller than the sum of its proper divisors (88664262344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77122001656 is a wasteful number, since it uses less digits than its factorization.

77122001656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3976 (or 3972 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 37.

The spelling of 77122001656 in words is "seventy-seven billion, one hundred twenty-two million, one thousand, six hundred fifty-six".