25523623472281 has 27 divisors (see below), whose sum is σ = 28835948263773. Its totient is φ = 22574359257120.

The previous prime is 25523623472213. The next prime is 25523623472293. The reversal of 25523623472281 is 18227432632552.

The square root of 25523623472281 is 5052091.

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 1549673929881 + 23973949542400 = 1244859^2 + 4896320^2 .

It is not a de Polignac number, because 25523623472281 - 2²⁵ = 25523589917849 is a prime.

It is a super-2 number, since 2×25523623472281² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25523623452281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2056194831 + ... + 2056207243.

Almost surely, 2^{25523623472281} is an apocalyptic number.

25523623472281 is the 5052091-st square number.

25523623472281 is the 2526046-th centered octagonal number.

It is an amenable number.

25523623472281 is a deficient number, since it is larger than the sum of its proper divisors (3312324791492).

25523623472281 is an frugal number, since it uses more digits than its factorization.

25523623472281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24922 (or 12461 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 52.

The spelling of 25523623472281 in words is "twenty-five trillion, five hundred twenty-three billion, six hundred twenty-three million, four hundred seventy-two thousand, two hundred eighty-one".