25644233434261 has 16 divisors (see below), whose sum is σ = 28860377382144. Its totient is φ = 22629159491904.

The previous prime is 25644233434159. The next prime is 25644233434291. The reversal of 25644233434261 is 16243433244652.

It is a cyclic number.

It is not a de Polignac number, because 25644233434261 - 2³⁵ = 25609873695893 is a prime.

It is a super-2 number, since 2×25644233434261² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25644233434291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 488007706 + ... + 488060251.

It is an arithmetic number, because the mean of its divisors is an integer number (1803773586384).

Almost surely, 2^{25644233434261} is an apocalyptic number.

It is an amenable number.

25644233434261 is a deficient number, since it is larger than the sum of its proper divisors (3216143947883).

25644233434261 is a wasteful number, since it uses less digits than its factorization.

25644233434261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976068060.

The product of its digits is 9953280, while the sum is 49.

The spelling of 25644233434261 in words is "twenty-five trillion, six hundred forty-four billion, two hundred thirty-three million, four hundred thirty-four thousand, two hundred sixty-one".