257383077831 has 24 divisors (see below), whose sum is σ = 406877477760. Its totient is φ = 155488150800.

The previous prime is 257383077817. The next prime is 257383077871. The reversal of 257383077831 is 138770383752.

257383077831 is a `hidden beast` number, since 2 + 573 + 8 + 30 + 7 + 7 + 8 + 31 = 666.

It is not a de Polignac number, because 257383077831 - 2²² = 257378883527 is a prime.

It is a super-2 number, since 2×257383077831² (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 (257383077871) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4149001 + ... + 4210578.

It is an arithmetic number, because the mean of its divisors is an integer number (16953228240).

Almost surely, 2^257383077831 is an apocalyptic number.

257383077831 is a deficient number, since it is larger than the sum of its proper divisors (149494399929).

257383077831 is a wasteful number, since it uses less digits than its factorization.

257383077831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8359907 (or 8359904 counting only the distinct ones).

The product of its (nonzero) digits is 5927040, while the sum is 54.

The spelling of 257383077831 in words is "two hundred fifty-seven billion, three hundred eighty-three million, seventy-seven thousand, eight hundred thirty-one".