25561416371022 has 96 divisors (see below), whose sum is σ = 66666226348800. Its totient is φ = 6914728041984.

The previous prime is 25561416371011. The next prime is 25561416371039. The reversal of 25561416371022 is 22017361416552.

25561416371022 is a `hidden beast` number, since 2 + 5 + 5 + 6 + 1 + 4 + 1 + 637 + 1 + 0 + 2 + 2 = 666.

It is a super-2 number, since 2×25561416371022² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 788254 + ... + 7193342.

It is an arithmetic number, because the mean of its divisors is an integer number (694439857800).

Almost surely, 2^{25561416371022} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25561416371022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33333113174400).

25561416371022 is an abundant number, since it is smaller than the sum of its proper divisors (41104809977778).

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

25561416371022 is a wasteful number, since it uses less digits than its factorization.

25561416371022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6406790 (or 6406787 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

Adding to 25561416371022 its reverse (22017361416552), we get a palindrome (47578777787574).

The spelling of 25561416371022 in words is "twenty-five trillion, five hundred sixty-one billion, four hundred sixteen million, three hundred seventy-one thousand, twenty-two".