255993806898 has 48 divisors (see below), whose sum is σ = 560677493376. Its totient is φ = 84406354560.

The previous prime is 255993806851. The next prime is 255993806923. The reversal of 255993806898 is 898608399552.

255993806898 is a `hidden beast` number, since 2 + 559 + 9 + 3 + 8 + 0 + 68 + 9 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1555011 + ... + 1711737.

It is an arithmetic number, because the mean of its divisors is an integer number (11680781112).

Almost surely, 2^255993806898 is an apocalyptic number.

255993806898 is an abundant number, since it is smaller than the sum of its proper divisors (304683686478).

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

255993806898 is a wasteful number, since it uses less digits than its factorization.

255993806898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157719 (or 157716 counting only the distinct ones).

The product of its (nonzero) digits is 335923200, while the sum is 72.

The spelling of 255993806898 in words is "two hundred fifty-five billion, nine hundred ninety-three million, eight hundred six thousand, eight hundred ninety-eight".