1625725404 has 42 divisors (see below), whose sum is σ = 4265585520. Its totient is φ = 541907496.

The previous prime is 1625725379. The next prime is 1625725417. The reversal of 1625725404 is 4045275261.

It is a happy number.

1625725404 is a `hidden beast` number, since 1 + 62 + 57 + 2 + 540 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 275844 + ... + 281675.

It is an arithmetic number, because the mean of its divisors is an integer number (101561560).

Almost surely, 2^1625725404 is an apocalyptic number.

It is an amenable number.

1625725404 is an abundant number, since it is smaller than the sum of its proper divisors (2639860116).

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

1625725404 is an equidigital number, since it uses as much as digits as its factorization.

1625725404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557541 (or 557524 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The square root of 1625725404 is about 40320.2852668480. The cubic root of 1625725404 is about 1175.8422581010.

The spelling of 1625725404 in words is "one billion, six hundred twenty-five million, seven hundred twenty-five thousand, four hundred four".