257237672068 has 24 divisors (see below), whose sum is σ = 484857459800. Its totient is φ = 118709556480.

The previous prime is 257237672059. The next prime is 257237672089. The reversal of 257237672068 is 860276732752.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4880140164 + 252357531904 = 69858^2 + 502352^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83008 + ... + 722056.

Almost surely, 2^257237672068 is an apocalyptic number.

It is an amenable number.

257237672068 is a deficient number, since it is larger than the sum of its proper divisors (227619787732).

257237672068 is a wasteful number, since it uses less digits than its factorization.

257237672068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646807 (or 646805 counting only the distinct ones).

The product of its (nonzero) digits is 11854080, while the sum is 55.

The spelling of 257237672068 in words is "two hundred fifty-seven billion, two hundred thirty-seven million, six hundred seventy-two thousand, sixty-eight".