255631720708 has 108 divisors (see below), whose sum is σ = 569319098292. Its totient is φ = 100085207040.

The previous prime is 255631720639. The next prime is 255631720733. The reversal of 255631720708 is 807027136552.

It can be written as a sum of positive squares in 6 ways, for example, as 83765094084 + 171866626624 = 289422^2 + 414568^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3173248 + ... + 3252808.

Almost surely, 2^255631720708 is an apocalyptic number.

255631720708 is a gapful number since it is divisible by the number (28) 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 255631720708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284659549146).

255631720708 is an abundant number, since it is smaller than the sum of its proper divisors (313687377584).

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

255631720708 is a wasteful number, since it uses less digits than its factorization.

255631720708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79702 (or 79680 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 46.

The spelling of 255631720708 in words is "two hundred fifty-five billion, six hundred thirty-one million, seven hundred twenty thousand, seven hundred eight".