257077663616 has 64 divisors (see below), whose sum is σ = 514904694480. Its totient is φ = 127848357888.

The previous prime is 257077663613. The next prime is 257077663621. The reversal of 257077663616 is 616366770752.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×257077663616² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257077663613) 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, 21019295 + ... + 21031521.

Almost surely, 2^257077663616 is an apocalyptic number.

It is an amenable number.

257077663616 is an abundant number, since it is smaller than the sum of its proper divisors (257827030864).

257077663616 is a wasteful number, since it uses less digits than its factorization.

257077663616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13111 (or 13099 counting only the distinct ones).

The product of its (nonzero) digits is 13335840, while the sum is 56.

The spelling of 257077663616 in words is "two hundred fifty-seven billion, seventy-seven million, six hundred sixty-three thousand, six hundred sixteen".