775085031920 has 20 divisors (see below), whose sum is σ = 1802072699400. Its totient is φ = 310034012736.

The previous prime is 775085031911. The next prime is 775085031937. The reversal of 775085031920 is 29130580577.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4844281370 + ... + 4844281529.

It is an arithmetic number, because the mean of its divisors is an integer number (90103634970).

Almost surely, 2^775085031920 is an apocalyptic number.

It is an amenable number.

775085031920 is an abundant number, since it is smaller than the sum of its proper divisors (1026987667480).

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

775085031920 is a wasteful number, since it uses less digits than its factorization.

775085031920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9688562912 (or 9688562906 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 47.

The spelling of 775085031920 in words is "seven hundred seventy-five billion, eighty-five million, thirty-one thousand, nine hundred twenty".