257144989564 has 12 divisors (see below), whose sum is σ = 450077654488. Its totient is φ = 128551374000.

The previous prime is 257144989531. The next prime is 257144989583. The reversal of 257144989564 is 465989441752.

It is a super-2 number, since 2×257144989564² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 257144989496 and 257144989505.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 5252787 + ... + 5301514.

Almost surely, 2^257144989564 is an apocalyptic number.

It is an amenable number.

257144989564 is a deficient number, since it is larger than the sum of its proper divisors (192932664924).

257144989564 is a wasteful number, since it uses less digits than its factorization.

257144989564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10560396 (or 10560394 counting only the distinct ones).

The product of its digits is 87091200, while the sum is 64.

The spelling of 257144989564 in words is "two hundred fifty-seven billion, one hundred forty-four million, nine hundred eighty-nine thousand, five hundred sixty-four".