25696994688 has 320 divisors, whose sum is σ = 79703648640. Its totient is φ = 8211456000.

The previous prime is 25696994683. The next prime is 25696994689. The reversal of 25696994688 is 88649969652.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25696994683) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 25929873 + ... + 25930863.

It is an arithmetic number, because the mean of its divisors is an integer number (249073902).

Almost surely, 2^25696994688 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 25696994688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39851824320).

25696994688 is an abundant number, since it is smaller than the sum of its proper divisors (54006653952).

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

25696994688 is an equidigital number, since it uses as much as digits as its factorization.

25696994688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119 (or 1098 counting only the distinct ones).

The product of its digits is 403107840, while the sum is 72.

The spelling of 25696994688 in words is "twenty-five billion, six hundred ninety-six million, nine hundred ninety-four thousand, six hundred eighty-eight".