25604160169 has 9 divisors (see below), whose sum is σ = 29785734237. Its totient is φ = 21945462924.

The previous prime is 25604160121. The next prime is 25604160199. The reversal of 25604160169 is 96106140652.

It is a happy number.

The square root of 25604160169 is 160013.

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

It is not a de Polignac number, because 25604160169 - 2⁷ = 25604160041 is a prime.

It is a super-2 number, since 2×25604160169² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25604160199) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1108662 + ... + 1131520.

Almost surely, 2^25604160169 is an apocalyptic number.

25604160169 is the 160013-rd square number.

25604160169 is the 80007-th centered octagonal number.

It is an amenable number.

25604160169 is a deficient number, since it is larger than the sum of its proper divisors (4181574068).

25604160169 is an frugal number, since it uses more digits than its factorization.

25604160169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45732 (or 22866 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The spelling of 25604160169 in words is "twenty-five billion, six hundred four million, one hundred sixty thousand, one hundred sixty-nine".