657641252 has 12 divisors (see below), whose sum is σ = 1152190620. Its totient is φ = 328443936.

The previous prime is 657641251. The next prime is 657641261. The reversal of 657641252 is 252146756.

657641252 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 501491236 + 156150016 = 22394^2 + 12496^2 .

It is not an unprimeable number, because it can be changed into a prime (657641251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90227 + ... + 97242.

It is an arithmetic number, because the mean of its divisors is an integer number (96015885).

Almost surely, 2^657641252 is an apocalyptic number.

It is an amenable number.

657641252 is a deficient number, since it is larger than the sum of its proper divisors (494549368).

657641252 is a wasteful number, since it uses less digits than its factorization.

657641252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188350 (or 188348 counting only the distinct ones).

The product of its digits is 100800, while the sum is 38.

The square root of 657641252 is about 25644.5169968163. The cubic root of 657641252 is about 869.6203266915.

It can be divided in two parts, 65764 and 1252, that multiplied together give a triangular number (82336528 = T₁₂₈₃₂).

The spelling of 657641252 in words is "six hundred fifty-seven million, six hundred forty-one thousand, two hundred fifty-two".