255623387904 has 216 divisors, whose sum is σ = 741911922752. Its totient is φ = 84645181440.

The previous prime is 255623387879. The next prime is 255623387917. The reversal of 255623387904 is 409783326552.

255623387904 is a `hidden beast` number, since 2 + 5 + 5 + 623 + 3 + 8 + 7 + 9 + 0 + 4 = 666.

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 23 ways as a sum of consecutive naturals, for example, 369932199 + ... + 369932889.

Almost surely, 2^255623387904 is an apocalyptic number.

255623387904 is a gapful number since it is divisible by the number (24) 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 255623387904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (370955961376).

255623387904 is an abundant number, since it is smaller than the sum of its proper divisors (486288534848).

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

255623387904 is a wasteful number, since it uses less digits than its factorization.

255623387904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543 (or 1526 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 54.

The spelling of 255623387904 in words is "two hundred fifty-five billion, six hundred twenty-three million, three hundred eighty-seven thousand, nine hundred four".