25812278244 has 27 divisors (see below), whose sum is σ = 65250140137. Its totient is φ = 8603771424.

The previous prime is 25812278237. The next prime is 25812278251. The reversal of 25812278244 is 44287221852.

The square root of 25812278244 is 160662.

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

25812278244 is a `hidden beast` number, since 2 + 581 + 2 + 27 + 8 + 2 + 44 = 666.

It is an interprime number because it is at equal distance from previous prime (25812278237) and next prime (25812278251).

It can be written as a sum of positive squares in only one way, i.e., 3756464100 + 22055814144 = 61290^2 + 148512^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25812278244.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 950584 + ... + 977360.

Almost surely, 2^25812278244 is an apocalyptic number.

25812278244 is the 160662-nd square number.

It is an amenable number.

25812278244 is an abundant number, since it is smaller than the sum of its proper divisors (39437861893).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25812278244 is an frugal number, since it uses more digits than its factorization.

25812278244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53564 (or 26782 counting only the distinct ones).

The product of its digits is 573440, while the sum is 45.

The spelling of 25812278244 in words is "twenty-five billion, eight hundred twelve million, two hundred seventy-eight thousand, two hundred forty-four".