1604166625 has 32 divisors (see below), whose sum is σ = 2108620800. Its totient is φ = 1216036800.

The previous prime is 1604166623. The next prime is 1604166649. The reversal of 1604166625 is 5266614061.

It is not a de Polignac number, because 1604166625 - 2¹ = 1604166623 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1604166623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 310816 + ... + 315934.

It is an arithmetic number, because the mean of its divisors is an integer number (65894400).

Almost surely, 2^1604166625 is an apocalyptic number.

It is an amenable number.

1604166625 is a deficient number, since it is larger than the sum of its proper divisors (504454175).

1604166625 is a wasteful number, since it uses less digits than its factorization.

1604166625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5266 (or 5256 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 1604166625 is about 40052.0489488366. The cubic root of 1604166625 is about 1170.6214890368.

The spelling of 1604166625 in words is "one billion, six hundred four million, one hundred sixty-six thousand, six hundred twenty-five".