257136765348 has 48 divisors (see below), whose sum is σ = 626167745280. Its totient is φ = 82024287744.

The previous prime is 257136765307. The next prime is 257136765367. The reversal of 257136765348 is 843567631752.

It is a super-2 number, since 2×257136765348² (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 15 ways as a sum of consecutive naturals, for example, 3230140 + ... + 3308787.

It is an arithmetic number, because the mean of its divisors is an integer number (13045161360).

Almost surely, 2^257136765348 is an apocalyptic number.

It is an amenable number.

257136765348 is an abundant number, since it is smaller than the sum of its proper divisors (369030979932).

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

257136765348 is a wasteful number, since it uses less digits than its factorization.

257136765348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6539076 (or 6539074 counting only the distinct ones).

The product of its digits is 25401600, while the sum is 57.

The spelling of 257136765348 in words is "two hundred fifty-seven billion, one hundred thirty-six million, seven hundred sixty-five thousand, three hundred forty-eight".