77122905625 has 20 divisors (see below), whose sum is σ = 97327048500. Its totient is φ = 61087400000.

The previous prime is 77122905617. The next prime is 77122905679. The reversal of 77122905625 is 52650922177.

It can be written as a sum of positive squares in 10 ways, for example, as 64491618304 + 12631287321 = 253952^2 + 112389^2 .

It is not a de Polignac number, because 77122905625 - 2³ = 77122905617 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 547750 + ... + 673999.

It is an arithmetic number, because the mean of its divisors is an integer number (4866352425).

Almost surely, 2^77122905625 is an apocalyptic number.

It is an amenable number.

77122905625 is a deficient number, since it is larger than the sum of its proper divisors (20204142875).

77122905625 is a wasteful number, since it uses less digits than its factorization.

77122905625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1221870 (or 1221855 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 46.

The spelling of 77122905625 in words is "seventy-seven billion, one hundred twenty-two million, nine hundred five thousand, six hundred twenty-five".