25133980369 has 3 divisors (see below), whose sum is σ = 25134138907. Its totient is φ = 25133821832.

The previous prime is 25133980331. The next prime is 25133980397. The reversal of 25133980369 is 96308933152.

It is a happy number.

The square root of 25133980369 is 158537.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 15429366225 + 9704614144 = 124215^2 + 98512^2 .

It is not a de Polignac number, because 25133980369 - 2⁷ = 25133980241 is a prime.

It is a super-2 number, since 2×25133980369² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25133980309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 79269 + ... + 237805.

Almost surely, 2^25133980369 is an apocalyptic number.

25133980369 is the 158537-th square number.

25133980369 is the 79269-th centered octagonal number.

It is an amenable number.

25133980369 is a deficient number, since it is larger than the sum of its proper divisors (158538).

25133980369 is an frugal number, since it uses more digits than its factorization.

25133980369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317074 (or 158537 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 49.

Multiplying 25133980369 by its sum of digits (49), we get a square (1231565038081 = 1109759²).

The spelling of 25133980369 in words is "twenty-five billion, one hundred thirty-three million, nine hundred eighty thousand, three hundred sixty-nine".