257981972683 has 8 divisors (see below), whose sum is σ = 258401908800. Its totient is φ = 257562336840.

The previous prime is 257981972663. The next prime is 257981972719. The reversal of 257981972683 is 386279189752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257981972683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257981972603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1677768 + ... + 1825066.

It is an arithmetic number, because the mean of its divisors is an integer number (32300238600).

Almost surely, 2^257981972683 is an apocalyptic number.

257981972683 is a deficient number, since it is larger than the sum of its proper divisors (419936117).

257981972683 is a wasteful number, since it uses less digits than its factorization.

257981972683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150137.

The product of its digits is 91445760, while the sum is 67.

The spelling of 257981972683 in words is "two hundred fifty-seven billion, nine hundred eighty-one million, nine hundred seventy-two thousand, six hundred eighty-three".