25352866436569 has 27 divisors (see below), whose sum is σ = 29566302059133. Its totient is φ = 21676497558912.

The previous prime is 25352866436567. The next prime is 25352866436593. The reversal of 25352866436569 is 96563466825352.

The square root of 25352866436569 is 5035163.

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 5120322672969 + 20232543763600 = 2262813^2 + 4498060^2 .

It is not a de Polignac number, because 25352866436569 - 2¹ = 25352866436567 is a prime.

It is a super-2 number, since 2×25352866436569² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25352866436498 and 25352866436507.

It is not an unprimeable number, because it can be changed into a prime (25352866436567) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 20900961007 + ... + 20900962219.

Almost surely, 2^{25352866436569} is an apocalyptic number.

25352866436569 is the 5035163-rd square number.

25352866436569 is the 2517582-nd centered octagonal number.

It is an amenable number.

25352866436569 is a deficient number, since it is larger than the sum of its proper divisors (4213435622564).

25352866436569 is an frugal number, since it uses more digits than its factorization.

25352866436569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3626 (or 1813 counting only the distinct ones).

The product of its digits is 1679616000, while the sum is 70.

The spelling of 25352866436569 in words is "twenty-five trillion, three hundred fifty-two billion, eight hundred sixty-six million, four hundred thirty-six thousand, five hundred sixty-nine".