25641335104 has 112 divisors (see below), whose sum is σ = 63498715776. Its totient is φ = 9980467200.

The previous prime is 25641335099. The next prime is 25641335113. The reversal of 25641335104 is 40153314652.

It is a tau number, because it is divible by the number of its divisors (112).

It is a self number, because there is not a number n which added to its sum of digits gives 25641335104.

It is a congruent number.

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, 7158594 + ... + 7162174.

Almost surely, 2^25641335104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25641335104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31749357888).

25641335104 is an abundant number, since it is smaller than the sum of its proper divisors (37857380672).

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

25641335104 is a wasteful number, since it uses less digits than its factorization.

25641335104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5064 (or 5054 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

Adding to 25641335104 its reverse (40153314652), we get a palindrome (65794649756).

The spelling of 25641335104 in words is "twenty-five billion, six hundred forty-one million, three hundred thirty-five thousand, one hundred four".