255850644820 has 24 divisors (see below), whose sum is σ = 539329279104. Its totient is φ = 101951129376.

The previous prime is 255850644799. The next prime is 255850644823. The reversal of 255850644820 is 28446058552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255850644823) 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, 24315144 + ... + 24325663.

It is an arithmetic number, because the mean of its divisors is an integer number (22472053296).

Almost surely, 2^255850644820 is an apocalyptic number.

255850644820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255850644820 is an abundant number, since it is smaller than the sum of its proper divisors (283478634284).

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

255850644820 is a wasteful number, since it uses less digits than its factorization.

255850644820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48641079 (or 48641077 counting only the distinct ones).

The product of its (nonzero) digits is 3072000, while the sum is 49.

The spelling of 255850644820 in words is "two hundred fifty-five billion, eight hundred fifty million, six hundred forty-four thousand, eight hundred twenty".