1575991498225 has 27 divisors (see below), whose sum is σ = 2001076274763. Its totient is φ = 1231261521840.

The previous prime is 1575991498187. The next prime is 1575991498241. The reversal of 1575991498225 is 5228941995751.

The square root of 1575991498225 is 1255385.

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., 567356939361 + 1008634558864 = 753231^2 + 1004308^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1575991498225 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, 269904856 + ... + 269910694.

Almost surely, 2^{1575991498225} is an apocalyptic number.

1575991498225 is the 1255385-th square number.

1575991498225 is the 627693-rd centered octagonal number.

It is an amenable number.

1575991498225 is a deficient number, since it is larger than the sum of its proper divisors (425084776538).

1575991498225 is an frugal number, since it uses more digits than its factorization.

1575991498225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11774 (or 5887 counting only the distinct ones).

The product of its digits is 81648000, while the sum is 67.

The spelling of 1575991498225 in words is "one trillion, five hundred seventy-five billion, nine hundred ninety-one million, four hundred ninety-eight thousand, two hundred twenty-five".