765505720828 has 24 divisors (see below), whose sum is σ = 1418557441392. Its totient is φ = 360207416064.

The previous prime is 765505720823. The next prime is 765505720849. The reversal of 765505720828 is 828027505567.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (765505720823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 339751 + ... + 1283137.

It is an arithmetic number, because the mean of its divisors is an integer number (59106560058).

Almost surely, 2^765505720828 is an apocalyptic number.

It is an amenable number.

765505720828 is a deficient number, since it is larger than the sum of its proper divisors (653051720564).

765505720828 is a wasteful number, since it uses less digits than its factorization.

765505720828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955341 (or 955339 counting only the distinct ones).

The product of its (nonzero) digits is 9408000, while the sum is 55.

The spelling of 765505720828 in words is "seven hundred sixty-five billion, five hundred five million, seven hundred twenty thousand, eight hundred twenty-eight".