257206645453404 has 48 divisors (see below), whose sum is σ = 604105640812800. Its totient is φ = 85171635394560.

The previous prime is 257206645453349. The next prime is 257206645453543. The reversal of 257206645453404 is 404354546602752.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82484874 + ... + 85546289.

It is an arithmetic number, because the mean of its divisors is an integer number (12585534183600).

Almost surely, 2^{257206645453404} is an apocalyptic number.

It is an amenable number.

257206645453404 is an abundant number, since it is smaller than the sum of its proper divisors (346898995359396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257206645453404 is a wasteful number, since it uses less digits than its factorization.

257206645453404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168032010 (or 168032008 counting only the distinct ones).

The product of its (nonzero) digits is 96768000, while the sum is 57.

The spelling of 257206645453404 in words is "two hundred fifty-seven trillion, two hundred six billion, six hundred forty-five million, four hundred fifty-three thousand, four hundred four".