25939687680 has 432 divisors, whose sum is σ = 97055824320. Its totient is φ = 6374080512.

The previous prime is 25939687667. The next prime is 25939687687. The reversal of 25939687680 is 8678693952.

It is not an unprimeable number, because it can be changed into a prime (25939687687) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8096959 + ... + 8100161.

It is an arithmetic number, because the mean of its divisors is an integer number (224666260).

Almost surely, 2^25939687680 is an apocalyptic number.

25939687680 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 25939687680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48527912160).

25939687680 is an abundant number, since it is smaller than the sum of its proper divisors (71116136640).

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

25939687680 is a wasteful number, since it uses less digits than its factorization.

25939687680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3286 (or 3269 counting only the distinct ones).

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

The spelling of 25939687680 in words is "twenty-five billion, nine hundred thirty-nine million, six hundred eighty-seven thousand, six hundred eighty".