625847985 has 128 divisors (see below), whose sum is σ = 1349913600. Its totient is φ = 269015040.

The previous prime is 625847969. The next prime is 625847993. The reversal of 625847985 is 589748526.

625847985 is a `hidden beast` number, since 625 + 8 + 4 + 7 + 9 + 8 + 5 = 666.

It is not a de Polignac number, because 625847985 - 2⁴ = 625847969 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1123327 + ... + 1123883.

It is an arithmetic number, because the mean of its divisors is an integer number (10546200).

Almost surely, 2^625847985 is an apocalyptic number.

It is an amenable number.

625847985 is an abundant number, since it is smaller than the sum of its proper divisors (724065615).

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

625847985 is a wasteful number, since it uses less digits than its factorization.

625847985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648 (or 642 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 54.

The square root of 625847985 is about 25016.9539512707. The cubic root of 625847985 is about 855.3744743134.

The spelling of 625847985 in words is "six hundred twenty-five million, eight hundred forty-seven thousand, nine hundred eighty-five".