1899752239225 has 27 divisors (see below), whose sum is σ = 2370335918349. Its totient is φ = 1510412709600.

The previous prime is 1899752239213. The next prime is 1899752239279. The reversal of 1899752239225 is 5229322579981.

The square root of 1899752239225 is 1378315.

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

It can be written as a sum of positive squares in 4 ways, for example, as 1019593043001 + 880159196224 = 1009749^2 + 938168^2 .

It is not a de Polignac number, because 1899752239225 - 2¹³ = 1899752231033 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1247374314 + ... + 1247375836.

Almost surely, 2^{1899752239225} is an apocalyptic number.

1899752239225 is the 1378315-th square number.

1899752239225 is the 689158-th centered octagonal number.

It is an amenable number.

1899752239225 is a deficient number, since it is larger than the sum of its proper divisors (470583679124).

1899752239225 is an frugal number, since it uses more digits than its factorization.

1899752239225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3418 (or 1709 counting only the distinct ones).

The product of its digits is 48988800, while the sum is 64.

Multiplying 1899752239225 by its sum of digits (64), we get a square (121584143310400 = 11026520²).

The spelling of 1899752239225 in words is "one trillion, eight hundred ninety-nine billion, seven hundred fifty-two million, two hundred thirty-nine thousand, two hundred twenty-five".