255406402290 has 64 divisors (see below), whose sum is σ = 660278013696. Its totient is φ = 62854916352.

The previous prime is 255406402267. The next prime is 255406402291. The reversal of 255406402290 is 92204604552.

255406402290 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (255406402291) by changing a digit.

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, 1689139 + ... + 1834121.

It is an arithmetic number, because the mean of its divisors is an integer number (10316843964).

Almost surely, 2^255406402290 is an apocalyptic number.

255406402290 is an abundant number, since it is smaller than the sum of its proper divisors (404871611406).

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

255406402290 is a wasteful number, since it uses less digits than its factorization.

255406402290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149523.

The product of its (nonzero) digits is 172800, while the sum is 39.

The spelling of 255406402290 in words is "two hundred fifty-five billion, four hundred six million, four hundred two thousand, two hundred ninety".