257734866831 has 16 divisors (see below), whose sum is σ = 370127479680. Its totient is φ = 158586081120.

The previous prime is 257734866817. The next prime is 257734866839. The reversal of 257734866831 is 138668437752.

It is a happy number.

It is not a de Polignac number, because 257734866831 - 2¹⁴ = 257734850447 is a prime.

It is a super-2 number, since 2×257734866831² (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 (257734866839) 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, 100041 + ... + 724898.

It is an arithmetic number, because the mean of its divisors is an integer number (23132967480).

Almost surely, 2^257734866831 is an apocalyptic number.

257734866831 is a deficient number, since it is larger than the sum of its proper divisors (112392612849).

257734866831 is a wasteful number, since it uses less digits than its factorization.

257734866831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832966.

The product of its digits is 40642560, while the sum is 60.

The spelling of 257734866831 in words is "two hundred fifty-seven billion, seven hundred thirty-four million, eight hundred sixty-six thousand, eight hundred thirty-one".