25581395348 has 24 divisors (see below), whose sum is σ = 45537777600. Its totient is φ = 12570712128.

The previous prime is 25581395339. The next prime is 25581395387. The reversal of 25581395348 is 84359318552.

It is a super-2 number, since 2×25581395348² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25581395348.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1111736 + ... + 1134512.

It is an arithmetic number, because the mean of its divisors is an integer number (1897407400).

Almost surely, 2^25581395348 is an apocalyptic number.

It is an amenable number.

25581395348 is a deficient number, since it is larger than the sum of its proper divisors (19956382252).

25581395348 is a wasteful number, since it uses less digits than its factorization.

25581395348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27599 (or 27597 counting only the distinct ones).

The product of its digits is 5184000, while the sum is 53.

The spelling of 25581395348 in words is "twenty-five billion, five hundred eighty-one million, three hundred ninety-five thousand, three hundred forty-eight".