25786399680 has 336 divisors, whose sum is σ = 96550215840. Its totient is φ = 6456434688.

The previous prime is 25786399649. The next prime is 25786399703. The reversal of 25786399680 is 8699368752.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 61542511 + ... + 61542929.

Almost surely, 2^25786399680 is an apocalyptic number.

25786399680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25786399680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48275107920).

25786399680 is an abundant number, since it is smaller than the sum of its proper divisors (70763816160).

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

25786399680 is an equidigital number, since it uses as much as digits as its factorization.

25786399680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881 (or 446 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 63.

The spelling of 25786399680 in words is "twenty-five billion, seven hundred eighty-six million, three hundred ninety-nine thousand, six hundred eighty".