657425829124 has 27 divisors (see below), whose sum is σ = 1182537982143. Its totient is φ = 319799592288.

The previous prime is 657425829119. The next prime is 657425829139. The reversal of 657425829124 is 421928524756.

The square root of 657425829124 is 810818.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 196764990724 + 460660838400 = 443582^2 + 678720^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 59995054 + ... + 60006010.

Almost surely, 2^657425829124 is an apocalyptic number.

657425829124 is the 810818-th square number.

It is an amenable number.

657425829124 is a deficient number, since it is larger than the sum of its proper divisors (525112153019).

657425829124 is an frugal number, since it uses more digits than its factorization.

657425829124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21992 (or 10996 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 55.

The spelling of 657425829124 in words is "six hundred fifty-seven billion, four hundred twenty-five million, eight hundred twenty-nine thousand, one hundred twenty-four".