25956411648 has 144 divisors (see below), whose sum is σ = 74527641216. Its totient is φ = 7989329920.

The previous prime is 25956411601. The next prime is 25956411661. The reversal of 25956411648 is 84611465952.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 25956411648.

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, 673213 + ... + 710723.

It is an arithmetic number, because the mean of its divisors is an integer number (517553064).

Almost surely, 2^25956411648 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 25956411648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37263820608).

25956411648 is an abundant number, since it is smaller than the sum of its proper divisors (48571229568).

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

25956411648 is a wasteful number, since it uses less digits than its factorization.

25956411648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37600 (or 37586 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 51.

The spelling of 25956411648 in words is "twenty-five billion, nine hundred fifty-six million, four hundred eleven thousand, six hundred forty-eight".