25641540798444 has 36 divisors (see below), whose sum is σ = 64821486800616. Its totient is φ = 8546472163008.

The previous prime is 25641540798443. The next prime is 25641540798451. The reversal of 25641540798444 is 44489704514652.

It is a happy number.

25641540798444 is a `hidden beast` number, since 2 + 5 + 6 + 4 + 1 + 540 + 7 + 9 + 84 + 4 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×25641540798444² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25641540798443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29063634 + ... + 29932889.

Almost surely, 2^{25641540798444} is an apocalyptic number.

It is an amenable number.

25641540798444 is an abundant number, since it is smaller than the sum of its proper divisors (39179946002172).

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

25641540798444 is a wasteful number, since it uses less digits than its factorization.

25641540798444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59008606 (or 59008601 counting only the distinct ones).

The product of its (nonzero) digits is 154828800, while the sum is 63.

The spelling of 25641540798444 in words is "twenty-five trillion, six hundred forty-one billion, five hundred forty million, seven hundred ninety-eight thousand, four hundred forty-four".