764161257 has 16 divisors (see below), whose sum is σ = 1035357120. Its totient is φ = 501268992.

The previous prime is 764161249. The next prime is 764161273. The reversal of 764161257 is 752161467.

764161257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 764161257 - 2³ = 764161249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (764161757) 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, 39013 + ... + 55229.

It is an arithmetic number, because the mean of its divisors is an integer number (64709820).

Almost surely, 2^764161257 is an apocalyptic number.

It is an amenable number.

764161257 is a deficient number, since it is larger than the sum of its proper divisors (271195863).

764161257 is a wasteful number, since it uses less digits than its factorization.

764161257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16472.

The product of its digits is 70560, while the sum is 39.

The square root of 764161257 is about 27643.4668050156. The cubic root of 764161257 is about 914.2430587789.

The spelling of 764161257 in words is "seven hundred sixty-four million, one hundred sixty-one thousand, two hundred fifty-seven".