25553438275656 has 64 divisors (see below), whose sum is σ = 64257705388800. Its totient is φ = 8467998576128.

The previous prime is 25553438275597. The next prime is 25553438275693. The reversal of 25553438275656 is 65657283435552.

It is a super-2 number, since 2×25553438275656² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3997921 + ... + 8190863.

It is an arithmetic number, because the mean of its divisors is an integer number (1004026646700).

Almost surely, 2^{25553438275656} is an apocalyptic number.

It is an amenable number.

25553438275656 is an abundant number, since it is smaller than the sum of its proper divisors (38704267113144).

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

25553438275656 is a wasteful number, since it uses less digits than its factorization.

25553438275656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4194438 (or 4194434 counting only the distinct ones).

The product of its digits is 907200000, while the sum is 66.

The spelling of 25553438275656 in words is "twenty-five trillion, five hundred fifty-three billion, four hundred thirty-eight million, two hundred seventy-five thousand, six hundred fifty-six".