25552851144561 has 72 divisors (see below), whose sum is σ = 41326592047104. Its totient is φ = 15705399523680.

The previous prime is 25552851144547. The next prime is 25552851144563. The reversal of 25552851144561 is 16544115825552.

25552851144561 is a `hidden beast` number, since 2 + 5 + 5 + 5 + 28 + 5 + 11 + 44 + 561 = 666.

It is not a de Polignac number, because 25552851144561 - 2²¹ = 25552849047409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25552851144498 and 25552851144507.

It is not an unprimeable number, because it can be changed into a prime (25552851144563) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 68987920 + ... + 69357326.

Almost surely, 2^{25552851144561} is an apocalyptic number.

It is an amenable number.

25552851144561 is a deficient number, since it is larger than the sum of its proper divisors (15773740902543).

25552851144561 is an frugal number, since it uses more digits than its factorization.

25552851144561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370255 (or 370234 counting only the distinct ones).

The product of its digits is 9600000, while the sum is 54.

The spelling of 25552851144561 in words is "twenty-five trillion, five hundred fifty-two billion, eight hundred fifty-one million, one hundred forty-four thousand, five hundred sixty-one".