1604588625 has 24 divisors (see below), whose sum is σ = 2892540456. Its totient is φ = 855780000.

The previous prime is 1604588563. The next prime is 1604588653. The reversal of 1604588625 is 5268854061.

1604588625 is a `hidden beast` number, since 1 + 6 + 0 + 4 + 588 + 62 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 14493249 + 1590095376 = 3807^2 + 39876^2 .

It is not a de Polignac number, because 1604588625 - 2²⁰ = 1603540049 is a prime.

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

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, 712026 + ... + 714275.

It is an arithmetic number, because the mean of its divisors is an integer number (120522519).

Almost surely, 2^1604588625 is an apocalyptic number.

1604588625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1604588625 is a deficient number, since it is larger than the sum of its proper divisors (1287951831).

1604588625 is a wasteful number, since it uses less digits than its factorization.

1604588625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1426322 (or 1426309 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 45.

The square root of 1604588625 is about 40057.3167473809. The cubic root of 1604588625 is about 1170.7241298616.

The spelling of 1604588625 in words is "one billion, six hundred four million, five hundred eighty-eight thousand, six hundred twenty-five".