1992148759225 has 9 divisors (see below), whose sum is σ = 2470273212367. Its totient is φ = 1593713361640.

The previous prime is 1992148759199. The next prime is 1992148759303. The reversal of 1992148759225 is 5229578412991.

The square root of 1992148759225 is 1411435.

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., 717173553321 + 1274975205904 = 846861^2 + 1129148^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1992148759225 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, 6916032 + ... + 7198318.

Almost surely, 2^{1992148759225} is an apocalyptic number.

1992148759225 is the 1411435-th square number.

1992148759225 is the 705718-th centered octagonal number.

It is an amenable number.

1992148759225 is a deficient number, since it is larger than the sum of its proper divisors (478124453142).

1992148759225 is an frugal number, since it uses more digits than its factorization.

1992148759225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564584 (or 282292 counting only the distinct ones).

The product of its digits is 32659200, while the sum is 64.

Multiplying 1992148759225 by its sum of digits (64), we get a square (127497520590400 = 11291480²).

The spelling of 1992148759225 in words is "one trillion, nine hundred ninety-two billion, one hundred forty-eight million, seven hundred fifty-nine thousand, two hundred twenty-five".