257290756816 has 10 divisors (see below), whose sum is σ = 498500841362. Its totient is φ = 128645378400.

The previous prime is 257290756781. The next prime is 257290756861. The reversal of 257290756816 is 618657092752.

It can be written as a sum of positive squares in only one way, i.e., 221084278416 + 36206478400 = 470196^2 + 190280^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8040336135 + ... + 8040336166.

Almost surely, 2^257290756816 is an apocalyptic number.

It is an amenable number.

257290756816 is a deficient number, since it is larger than the sum of its proper divisors (241210084546).

257290756816 is a wasteful number, since it uses less digits than its factorization.

257290756816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16080672309 (or 16080672303 counting only the distinct ones).

The product of its (nonzero) digits is 12700800, while the sum is 58.

The spelling of 257290756816 in words is "two hundred fifty-seven billion, two hundred ninety million, seven hundred fifty-six thousand, eight hundred sixteen".