3992395617604 has 9 divisors (see below), whose sum is σ = 6986699324157. Its totient is φ = 1996195810704.

The previous prime is 3992395617557. The next prime is 3992395617607. The reversal of 3992395617604 is 4067165932993.

The square root of 3992395617604 is 1998098.

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., 1670551080004 + 2321844537600 = 1292498^2 + 1523760^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3992395617607) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3496672 + ... + 4495720.

Almost surely, 2^{3992395617604} is an apocalyptic number.

3992395617604 is the 1998098-th square number.

It is an amenable number.

3992395617604 is a deficient number, since it is larger than the sum of its proper divisors (2994303706553).

3992395617604 is an frugal number, since it uses more digits than its factorization.

3992395617604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1998102 (or 999051 counting only the distinct ones).

The product of its (nonzero) digits is 66134880, while the sum is 64.

Multiplying 3992395617604 by its sum of digits (64), we get a square (255513319526656 = 15984784²).

The spelling of 3992395617604 in words is "three trillion, nine hundred ninety-two billion, three hundred ninety-five million, six hundred seventeen thousand, six hundred four".