256137436134822 has 32 divisors (see below), whose sum is σ = 563245672034304. Its totient is φ = 77006244218400.

The previous prime is 256137436134803. The next prime is 256137436134941. The reversal of 256137436134822 is 228431634731652.

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, 15279008329 + ... + 15279025092.

It is an arithmetic number, because the mean of its divisors is an integer number (17601427251072).

Almost surely, 2^{256137436134822} is an apocalyptic number.

256137436134822 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

256137436134822 is an abundant number, since it is smaller than the sum of its proper divisors (307108235899482).

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

256137436134822 is a wasteful number, since it uses less digits than its factorization.

256137436134822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30558033564.

The product of its digits is 34836480, while the sum is 57.

The spelling of 256137436134822 in words is "two hundred fifty-six trillion, one hundred thirty-seven billion, four hundred thirty-six million, one hundred thirty-four thousand, eight hundred twenty-two".