257313317870 has 32 divisors (see below), whose sum is σ = 547583025600. Its totient is φ = 85179580416.

The previous prime is 257313317813. The next prime is 257313317873. The reversal of 257313317870 is 78713313752.

257313317870 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×257313317870² (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 (257313317873) 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, 63375635 + ... + 63379694.

It is an arithmetic number, because the mean of its divisors is an integer number (17111969550).

Almost surely, 2^257313317870 is an apocalyptic number.

257313317870 is an abundant number, since it is smaller than the sum of its proper divisors (290269707730).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257313317870 is a wasteful number, since it uses less digits than its factorization.

257313317870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126755372.

The product of its (nonzero) digits is 740880, while the sum is 47.

The spelling of 257313317870 in words is "two hundred fifty-seven billion, three hundred thirteen million, three hundred seventeen thousand, eight hundred seventy".