257555827830 has 32 divisors (see below), whose sum is σ = 706438842624. Its totient is φ = 58869903456.

The previous prime is 257555827807. The next prime is 257555827843. The reversal of 257555827830 is 38728555752.

It is a congruent number.

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, 613227952 + ... + 613228371.

It is an arithmetic number, because the mean of its divisors is an integer number (22076213832).

Almost surely, 2^257555827830 is an apocalyptic number.

257555827830 is an abundant number, since it is smaller than the sum of its proper divisors (448883014794).

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

257555827830 is a wasteful number, since it uses less digits than its factorization.

257555827830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226456340.

The product of its (nonzero) digits is 23520000, while the sum is 57.

It can be divided in two parts, 25755 and 5827830, that added together give a palindrome (5853585).

The spelling of 257555827830 in words is "two hundred fifty-seven billion, five hundred fifty-five million, eight hundred twenty-seven thousand, eight hundred thirty".