255065215720 has 64 divisors (see below), whose sum is σ = 668257153920. Its totient is φ = 85800908544.

The previous prime is 255065215711. The next prime is 255065215739. The reversal of 255065215720 is 27512560552.

It is a Harshad number since it is a multiple of its sum of digits (40).

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, 8579002 + ... + 8608681.

It is an arithmetic number, because the mean of its divisors is an integer number (10441518030).

Almost surely, 2^255065215720 is an apocalyptic number.

255065215720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255065215720 is an abundant number, since it is smaller than the sum of its proper divisors (413191938200).

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

255065215720 is a wasteful number, since it uses less digits than its factorization.

255065215720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17187754 (or 17187750 counting only the distinct ones).

The product of its (nonzero) digits is 210000, while the sum is 40.

The spelling of 255065215720 in words is "two hundred fifty-five billion, sixty-five million, two hundred fifteen thousand, seven hundred twenty".