257135279370 has 128 divisors (see below), whose sum is σ = 627149952000. Its totient is φ = 67467767808.

The previous prime is 257135279341. The next prime is 257135279399. The reversal of 257135279370 is 73972531752.

It is an interprime number because it is at equal distance from previous prime (257135279341) and next prime (257135279399).

It is a super-2 number, since 2×257135279370² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 248920374 + ... + 248921406.

It is an arithmetic number, because the mean of its divisors is an integer number (4899609000).

Almost surely, 2^257135279370 is an apocalyptic number.

257135279370 is an abundant number, since it is smaller than the sum of its proper divisors (370014672630).

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

257135279370 is a wasteful number, since it uses less digits than its factorization.

257135279370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1664.

The product of its (nonzero) digits is 2778300, while the sum is 51.

The spelling of 257135279370 in words is "two hundred fifty-seven billion, one hundred thirty-five million, two hundred seventy-nine thousand, three hundred seventy".