657045405122 has 18 divisors (see below), whose sum is σ = 989318781747. Its totient is φ = 327277206324.

The previous prime is 657045405119. The next prime is 657045405169. The reversal of 657045405122 is 221504540756.

It can be written as a sum of positive squares in only one way, i.e., 328522702561 + 328522702561 = 573169^2 + 573169^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=573169.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 657045405122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 351924833 + ... + 351926699.

Almost surely, 2^657045405122 is an apocalyptic number.

657045405122 is a deficient number, since it is larger than the sum of its proper divisors (332273376625).

657045405122 is an frugal number, since it uses more digits than its factorization.

657045405122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4350 (or 2176 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 41.

Adding to 657045405122 its reverse (221504540756), we get a palindrome (878549945878).

The spelling of 657045405122 in words is "six hundred fifty-seven billion, forty-five million, four hundred five thousand, one hundred twenty-two".