3990905175625 has 45 divisors (see below), whose sum is σ = 5114260860313. Its totient is φ = 3113254640000.

The previous prime is 3990905175617. The next prime is 3990905175629. The reversal of 3990905175625 is 5265715090993.

The square root of 3990905175625 is 1997725.

It is a perfect power (a square), and thus also a powerful number.

3990905175625 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 22 ways, for example, as 3007404550969 + 983500624656 = 1734187^2 + 991716^2 .

It is not a de Polignac number, because 3990905175625 - 2³ = 3990905175617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3990905175629) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 2047667151 + ... + 2047669099.

Almost surely, 2^{3990905175625} is an apocalyptic number.

3990905175625 is the 1997725-th square number.

3990905175625 is the 998863-rd centered octagonal number.

It is an amenable number.

3990905175625 is a deficient number, since it is larger than the sum of its proper divisors (1123355684688).

3990905175625 is an frugal number, since it uses more digits than its factorization.

3990905175625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4000 (or 1995 counting only the distinct ones).

The product of its (nonzero) digits is 22963500, while the sum is 61.

The spelling of 3990905175625 in words is "three trillion, nine hundred ninety billion, nine hundred five million, one hundred seventy-five thousand, six hundred twenty-five".