255238756480 has 64 divisors (see below), whose sum is σ = 623162782080. Its totient is φ = 99923246080.

The previous prime is 255238756447. The next prime is 255238756481. The reversal of 255238756480 is 84657832552.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (255238756481) 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, 4212586 + ... + 4272745.

It is an arithmetic number, because the mean of its divisors is an integer number (9736918470).

Almost surely, 2^255238756480 is an apocalyptic number.

255238756480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255238756480 is an abundant number, since it is smaller than the sum of its proper divisors (367924025600).

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

255238756480 is an equidigital number, since it uses as much as digits as its factorization.

255238756480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8485397 (or 8485385 counting only the distinct ones).

The product of its (nonzero) digits is 16128000, while the sum is 55.

The spelling of 255238756480 in words is "two hundred fifty-five billion, two hundred thirty-eight million, seven hundred fifty-six thousand, four hundred eighty".