257201678331 has 12 divisors (see below), whose sum is σ = 400091499808. Its totient is φ = 158277955824.

The previous prime is 257201678309. The next prime is 257201678333. The reversal of 257201678331 is 133876102752.

257201678331 is a `hidden beast` number, since 2 + 57 + 201 + 67 + 8 + 331 = 666.

It is not a de Polignac number, because 257201678331 - 2⁹ = 257201677819 is a prime.

It is a super-2 number, since 2×257201678331² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (257201678333) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1099152355 + ... + 1099152588.

Almost surely, 2^257201678331 is an apocalyptic number.

257201678331 is a deficient number, since it is larger than the sum of its proper divisors (142889821477).

257201678331 is a wasteful number, since it uses less digits than its factorization.

257201678331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2198304962 (or 2198304959 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The spelling of 257201678331 in words is "two hundred fifty-seven billion, two hundred one million, six hundred seventy-eight thousand, three hundred thirty-one".