25524216169 has 3 divisors (see below), whose sum is σ = 25524375933. Its totient is φ = 25524056406.

The previous prime is 25524216131. The next prime is 25524216229. The reversal of 25524216169 is 96161242552.

The square root of 25524216169 is 159763.

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 is not a de Polignac number, because 25524216169 - 2³³ = 16934281577 is a prime.

It is a super-2 number, since 2×25524216169² (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 (25524216119) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 79882 + ... + 239644.

It is an arithmetic number, because the mean of its divisors is an integer number (8508125311).

Almost surely, 2^25524216169 is an apocalyptic number.

25524216169 is the 159763-rd square number.

25524216169 is the 79882-nd centered octagonal number.

It is an amenable number.

25524216169 is a deficient number, since it is larger than the sum of its proper divisors (159764).

25524216169 is an frugal number, since it uses more digits than its factorization.

25524216169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319526 (or 159763 counting only the distinct ones).

The product of its digits is 259200, while the sum is 43.

The spelling of 25524216169 in words is "twenty-five billion, five hundred twenty-four million, two hundred sixteen thousand, one hundred sixty-nine".