775327081564 has 48 divisors (see below), whose sum is σ = 1555971056640. Its totient is φ = 331144162560.

The previous prime is 775327081561. The next prime is 775327081567. The reversal of 775327081564 is 465180723577.

It is an interprime number because it is at equal distance from previous prime (775327081561) and next prime (775327081567).

It is a super-2 number, since 2×775327081564² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (775327081561) 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, 75658689 + ... + 75668935.

It is an arithmetic number, because the mean of its divisors is an integer number (32416063680).

Almost surely, 2^775327081564 is an apocalyptic number.

It is an amenable number.

775327081564 is an abundant number, since it is smaller than the sum of its proper divisors (780643975076).

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

775327081564 is a wasteful number, since it uses less digits than its factorization.

775327081564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19258 (or 19256 counting only the distinct ones).

The product of its (nonzero) digits is 9878400, while the sum is 55.

The spelling of 775327081564 in words is "seven hundred seventy-five billion, three hundred twenty-seven million, eighty-one thousand, five hundred sixty-four".