255509157888 has 336 divisors, whose sum is σ = 811128722040. Its totient is φ = 80151773184.

The previous prime is 255509157863. The next prime is 255509157889. The reversal of 255509157888 is 888751905552.

255509157888 is a `hidden beast` number, since 2 + 5 + 5 + 50 + 9 + 1 + 578 + 8 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255509157889) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 25375831 + ... + 25385897.

Almost surely, 2^255509157888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255509157888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (405564361020).

255509157888 is an abundant number, since it is smaller than the sum of its proper divisors (555619564152).

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

255509157888 is an equidigital number, since it uses as much as digits as its factorization.

255509157888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10124 (or 10089 counting only the distinct ones).

The product of its (nonzero) digits is 40320000, while the sum is 63.

The spelling of 255509157888 in words is "two hundred fifty-five billion, five hundred nine million, one hundred fifty-seven thousand, eight hundred eighty-eight".