255530165625 has 144 divisors (see below), whose sum is σ = 528903648000. Its totient is φ = 116447760000.

The previous prime is 255530165603. The next prime is 255530165659. The reversal of 255530165625 is 526561035552.

255530165625 is a `hidden beast` number, since 2 + 5 + 5 + 5 + 3 + 0 + 16 + 5 + 625 = 666.

It is not a de Polignac number, because 255530165625 - 2⁹ = 255530165113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 68707516 + ... + 68711234.

It is an arithmetic number, because the mean of its divisors is an integer number (3672942000).

Almost surely, 2^255530165625 is an apocalyptic number.

255530165625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

255530165625 is an abundant number, since it is smaller than the sum of its proper divisors (273373482375).

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

255530165625 is an equidigital number, since it uses as much as digits as its factorization.

255530165625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4106 (or 4083 counting only the distinct ones).

The product of its (nonzero) digits is 1350000, while the sum is 45.

The spelling of 255530165625 in words is "two hundred fifty-five billion, five hundred thirty million, one hundred sixty-five thousand, six hundred twenty-five".