257031615745 has 16 divisors (see below), whose sum is σ = 313532164800. Its totient is φ = 202229956800.

The previous prime is 257031615679. The next prime is 257031615751. The reversal of 257031615745 is 547516130752.

It is not a de Polignac number, because 257031615745 - 2²¹ = 257029518593 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 257031615695 and 257031615704.

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, 2726406 + ... + 2819104.

It is an arithmetic number, because the mean of its divisors is an integer number (19595760300).

Almost surely, 2^257031615745 is an apocalyptic number.

It is an amenable number.

257031615745 is a deficient number, since it is larger than the sum of its proper divisors (56500549055).

257031615745 is an equidigital number, since it uses as much as digits as its factorization.

257031615745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101856.

The product of its (nonzero) digits is 882000, while the sum is 46.

The spelling of 257031615745 in words is "two hundred fifty-seven billion, thirty-one million, six hundred fifteen thousand, seven hundred forty-five".