255801128838 has 16 divisors (see below), whose sum is σ = 511700010480. Its totient is φ = 85250750816.

The previous prime is 255801128831. The next prime is 255801128839. The reversal of 255801128838 is 838821108552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255801128831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4038993 + ... + 4101836.

It is an arithmetic number, because the mean of its divisors is an integer number (31981250655).

Almost surely, 2^255801128838 is an apocalyptic number.

255801128838 is an abundant number, since it is smaller than the sum of its proper divisors (255898881642).

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

255801128838 is a wasteful number, since it uses less digits than its factorization.

255801128838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8146071.

The product of its (nonzero) digits is 1228800, while the sum is 51.

The spelling of 255801128838 in words is "two hundred fifty-five billion, eight hundred one million, one hundred twenty-eight thousand, eight hundred thirty-eight".