1995989712025 has 9 divisors (see below), whose sum is σ = 2475036002271. Its totient is φ = 1596786118440.

The previous prime is 1995989712001. The next prime is 1995989712047. The reversal of 1995989712025 is 5202179895991.

The square root of 1995989712025 is 1412795.

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., 718556296329 + 1277433415696 = 847677^2 + 1130236^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1995989712025 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6922696 + ... + 7205254.

Almost surely, 2^{1995989712025} is an apocalyptic number.

1995989712025 is the 1412795-th square number.

1995989712025 is the 706398-th centered octagonal number.

It is an amenable number.

1995989712025 is a deficient number, since it is larger than the sum of its proper divisors (479046290246).

1995989712025 is an frugal number, since it uses more digits than its factorization.

1995989712025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565128 (or 282564 counting only the distinct ones).

The product of its (nonzero) digits is 36741600, while the sum is 67.

The spelling of 1995989712025 in words is "one trillion, nine hundred ninety-five billion, nine hundred eighty-nine million, seven hundred twelve thousand, twenty-five".