256621527125330 has 16 divisors (see below), whose sum is σ = 462109861301400. Its totient is φ = 102606141411072.

The previous prime is 256621527125309. The next prime is 256621527125357. The reversal of 256621527125330 is 33521725126652.

It can be written as a sum of positive squares in 4 ways, for example, as 256527919887121 + 93607238209 = 16016489^2 + 305953^2 .

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, 5308654505 + ... + 5308702844.

Almost surely, 2^{256621527125330} is an apocalyptic number.

256621527125330 is a deficient number, since it is larger than the sum of its proper divisors (205488334176070).

256621527125330 is a wasteful number, since it uses less digits than its factorization.

256621527125330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10617359773.

The product of its (nonzero) digits is 4536000, while the sum is 50.

The spelling of 256621527125330 in words is "two hundred fifty-six trillion, six hundred twenty-one billion, five hundred twenty-seven million, one hundred twenty-five thousand, three hundred thirty".