257754213661 has 16 divisors (see below), whose sum is σ = 296520343168. Its totient is φ = 219477988800.

The previous prime is 257754213659. The next prime is 257754213727. The reversal of 257754213661 is 166312457752.

It is not a de Polignac number, because 257754213661 - 2¹ = 257754213659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257754213631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 637771 + ... + 960343.

It is an arithmetic number, because the mean of its divisors is an integer number (18532521448).

Almost surely, 2^257754213661 is an apocalyptic number.

It is an amenable number.

257754213661 is a deficient number, since it is larger than the sum of its proper divisors (38766129507).

257754213661 is a wasteful number, since it uses less digits than its factorization.

257754213661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323332.

The product of its digits is 2116800, while the sum is 49.

The spelling of 257754213661 in words is "two hundred fifty-seven billion, seven hundred fifty-four million, two hundred thirteen thousand, six hundred sixty-one".