257981972684 has 12 divisors (see below), whose sum is σ = 471097515504. Its totient is φ = 123382682544.

The previous prime is 257981972663. The next prime is 257981972719. The reversal of 257981972684 is 486279189752.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1402075847 + ... + 1402076030.

It is an arithmetic number, because the mean of its divisors is an integer number (39258126292).

Almost surely, 2^257981972684 is an apocalyptic number.

It is an amenable number.

257981972684 is a deficient number, since it is larger than the sum of its proper divisors (213115542820).

257981972684 is a wasteful number, since it uses less digits than its factorization.

257981972684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2804151904 (or 2804151902 counting only the distinct ones).

The product of its digits is 121927680, while the sum is 68.

The spelling of 257981972684 in words is "two hundred fifty-seven billion, nine hundred eighty-one million, nine hundred seventy-two thousand, six hundred eighty-four".