255492961920 has 768 divisors, whose sum is σ = 1089526464000. Its totient is φ = 54955966464.

The previous prime is 255492961901. The next prime is 255492962051. The reversal of 255492961920 is 29169294552.

255492961920 is a `hidden beast` number, since 2 + 5 + 5 + 492 + 9 + 61 + 92 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 33582757 + ... + 33590363.

It is an arithmetic number, because the mean of its divisors is an integer number (1418654250).

Almost surely, 2^255492961920 is an apocalyptic number.

255492961920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255492961920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (544763232000).

255492961920 is an abundant number, since it is smaller than the sum of its proper divisors (834033502080).

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

255492961920 is a wasteful number, since it uses less digits than its factorization.

255492961920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7670 (or 7641 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 54.

The spelling of 255492961920 in words is "two hundred fifty-five billion, four hundred ninety-two million, nine hundred sixty-one thousand, nine hundred twenty".