257615986616 has 16 divisors (see below), whose sum is σ = 483045145440. Its totient is φ = 128803947840.

The previous prime is 257615986553. The next prime is 257615986637. The reversal of 257615986616 is 616689516752.

It is a super-2 number, since 2×257615986616² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 225941 + ... + 752516.

It is an arithmetic number, because the mean of its divisors is an integer number (30190321590).

Almost surely, 2^257615986616 is an apocalyptic number.

It is an amenable number.

257615986616 is a deficient number, since it is larger than the sum of its proper divisors (225429158824).

257615986616 is a wasteful number, since it uses less digits than its factorization.

257615986616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011374 (or 1011370 counting only the distinct ones).

The product of its digits is 32659200, while the sum is 62.

The spelling of 257615986616 in words is "two hundred fifty-seven billion, six hundred fifteen million, nine hundred eighty-six thousand, six hundred sixteen".