257541331064 has 8 divisors (see below), whose sum is σ = 482889995760. Its totient is φ = 128770665528.

The previous prime is 257541331051. The next prime is 257541331109. The reversal of 257541331064 is 460133145752.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16096333184 + ... + 16096333199.

It is an arithmetic number, because the mean of its divisors is an integer number (60361249470).

Almost surely, 2^257541331064 is an apocalyptic number.

It is an amenable number.

257541331064 is a deficient number, since it is larger than the sum of its proper divisors (225348664696).

257541331064 is a wasteful number, since it uses less digits than its factorization.

257541331064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32192666389 (or 32192666385 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 41.

The spelling of 257541331064 in words is "two hundred fifty-seven billion, five hundred forty-one million, three hundred thirty-one thousand, sixty-four".