257136770306 has 16 divisors (see below), whose sum is σ = 428773970688. Its totient is φ = 114850170000.

The previous prime is 257136770299. The next prime is 257136770321. The reversal of 257136770306 is 603077631752.

257136770306 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 2×257136770306² (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 7 ways as a sum of consecutive naturals, for example, 159513320 + ... + 159514931.

It is an arithmetic number, because the mean of its divisors is an integer number (26798373168).

Almost surely, 2^257136770306 is an apocalyptic number.

257136770306 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

257136770306 is a deficient number, since it is larger than the sum of its proper divisors (171637200382).

257136770306 is a wasteful number, since it uses less digits than its factorization.

257136770306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319028297.

The product of its (nonzero) digits is 1111320, while the sum is 47.

The spelling of 257136770306 in words is "two hundred fifty-seven billion, one hundred thirty-six million, seven hundred seventy thousand, three hundred six".