772505868 has 12 divisors (see below), whose sum is σ = 1802513720. Its totient is φ = 257501952.

The previous prime is 772505843. The next prime is 772505911. The reversal of 772505868 is 868505277.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32187733 + ... + 32187756.

Almost surely, 2^772505868 is an apocalyptic number.

It is an amenable number.

772505868 is an abundant number, since it is smaller than the sum of its proper divisors (1030007852).

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

772505868 is a wasteful number, since it uses less digits than its factorization.

772505868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64375496 (or 64375494 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 48.

The square root of 772505868 is about 27793.9897819655. The cubic root of 772505868 is about 917.5588512664.

The spelling of 772505868 in words is "seven hundred seventy-two million, five hundred five thousand, eight hundred sixty-eight".