25813490688 has 132 divisors (see below), whose sum is σ = 76941129408. Its totient is φ = 8326840320.

The previous prime is 25813490671. The next prime is 25813490699. The reversal of 25813490688 is 88609431852.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 240520 + ... + 330872.

It is an arithmetic number, because the mean of its divisors is an integer number (582887344).

Almost surely, 2^25813490688 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 25813490688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38470564704).

25813490688 is an abundant number, since it is smaller than the sum of its proper divisors (51127638720).

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

25813490688 is a wasteful number, since it uses less digits than its factorization.

25813490688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90410 (or 90389 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 54.

The spelling of 25813490688 in words is "twenty-five billion, eight hundred thirteen million, four hundred ninety thousand, six hundred eighty-eight".