255984774942 has 64 divisors (see below), whose sum is σ = 561897616896. Its totient is φ = 77258762880.

The previous prime is 255984774937. The next prime is 255984774979. The reversal of 255984774942 is 249477489552.

255984774942 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×255984774942² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31095967 + ... + 31104197.

It is an arithmetic number, because the mean of its divisors is an integer number (8779650264).

Almost surely, 2^255984774942 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255984774942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280948808448).

255984774942 is an abundant number, since it is smaller than the sum of its proper divisors (305912841954).

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

255984774942 is a wasteful number, since it uses less digits than its factorization.

255984774942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15825.

The product of its digits is 203212800, while the sum is 66.

The spelling of 255984774942 in words is "two hundred fifty-five billion, nine hundred eighty-four million, seven hundred seventy-four thousand, nine hundred forty-two".