1625618925 has 72 divisors (see below), whose sum is σ = 3442458240. Its totient is φ = 717494400.

The previous prime is 1625618899. The next prime is 1625619019. The reversal of 1625618925 is 5298165261.

1625618925 is a `hidden beast` number, since 1 + 6 + 2 + 5 + 618 + 9 + 25 = 666.

It is not a de Polignac number, because 1625618925 - 2⁹ = 1625618413 is a prime.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 27880 + ... + 63470.

It is an arithmetic number, because the mean of its divisors is an integer number (47811920).

Almost surely, 2^1625618925 is an apocalyptic number.

1625618925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1625618925 is an abundant number, since it is smaller than the sum of its proper divisors (1816839315).

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

1625618925 is a wasteful number, since it uses less digits than its factorization.

1625618925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35643 (or 35635 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 1625618925 is about 40318.9648304616. The cubic root of 1625618925 is about 1175.8165864345.

The spelling of 1625618925 in words is "one billion, six hundred twenty-five million, six hundred eighteen thousand, nine hundred twenty-five".