255616620 has 48 divisors (see below), whose sum is σ = 817974528. Its totient is φ = 58426560.

The previous prime is 255616619. The next prime is 255616681. The reversal of 255616620 is 26616552.

It is a happy 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, 303886 + ... + 304725.

It is an arithmetic number, because the mean of its divisors is an integer number (17041136).

Almost surely, 2^255616620 is an apocalyptic number.

255616620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255616620 is an abundant number, since it is smaller than the sum of its proper divisors (562357908).

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

255616620 is a wasteful number, since it uses less digits than its factorization.

255616620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608630 (or 608628 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 255616620 is about 15988.0148861577. The cubic root of 255616620 is about 634.6432948154.

The spelling of 255616620 in words is "two hundred fifty-five million, six hundred sixteen thousand, six hundred twenty".