3990861225796 has 9 divisors (see below), whose sum is σ = 6984014137149. Its totient is φ = 1995428615184.

The previous prime is 3990861225751. The next prime is 3990861225803. The reversal of 3990861225796 is 6975221680993.

The square root of 3990861225796 is 1997714.

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

It can be written as a sum of positive squares in only one way, i.e., 3666344152900 + 324517072896 = 1914770^2 + 569664^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3496000 + ... + 4494856.

Almost surely, 2^{3990861225796} is an apocalyptic number.

3990861225796 is the 1997714-th square number.

It is an amenable number.

3990861225796 is a deficient number, since it is larger than the sum of its proper divisors (2993152911353).

3990861225796 is an frugal number, since it uses more digits than its factorization.

3990861225796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1997718 (or 998859 counting only the distinct ones).

The product of its (nonzero) digits is 88179840, while the sum is 67.

The spelling of 3990861225796 in words is "three trillion, nine hundred ninety billion, eight hundred sixty-one million, two hundred twenty-five thousand, seven hundred ninety-six".