255688139368 has 16 divisors (see below), whose sum is σ = 495946822500. Its totient is φ = 123435653376.

The previous prime is 255688139309. The next prime is 255688139387. The reversal of 255688139368 is 863931886552.

It can be written as a sum of positive squares in 2 ways, for example, as 252042153444 + 3645985924 = 502038^2 + 60382^2 .

It is a super-2 number, since 2×255688139368² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 551051793 + ... + 551052256.

Almost surely, 2^255688139368 is an apocalyptic number.

It is an amenable number.

255688139368 is a deficient number, since it is larger than the sum of its proper divisors (240258683132).

255688139368 is a wasteful number, since it uses less digits than its factorization.

255688139368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102104084 (or 1102104080 counting only the distinct ones).

The product of its digits is 74649600, while the sum is 64.

The spelling of 255688139368 in words is "two hundred fifty-five billion, six hundred eighty-eight million, one hundred thirty-nine thousand, three hundred sixty-eight".