25843456081 has 9 divisors (see below), whose sum is σ = 27278450523. Its totient is φ = 24480380520.

The previous prime is 25843456027. The next prime is 25843456091. The reversal of 25843456081 is 18065434852.

The square root of 25843456081 is 160759.

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

It can be written as a sum of positive squares in only one way, i.e., 21621055681 + 4222400400 = 147041^2 + 64980^2 .

It is not a de Polignac number, because 25843456081 - 2¹⁷ = 25843325009 is a prime.

It is a super-2 number, since 2×25843456081² (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 (25843456021) 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, 3050191 + ... + 3058651.

It is an arithmetic number, because the mean of its divisors is an integer number (3030938947).

Almost surely, 2^25843456081 is an apocalyptic number.

25843456081 is the 160759-th square number.

25843456081 is the 80380-th centered octagonal number.

It is an amenable number.

25843456081 is a deficient number, since it is larger than the sum of its proper divisors (1434994442).

25843456081 is an frugal number, since it uses more digits than its factorization.

25843456081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16960 (or 8480 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 46.

The spelling of 25843456081 in words is "twenty-five billion, eight hundred forty-three million, four hundred fifty-six thousand, eighty-one".