25668769740980 has 72 divisors (see below), whose sum is σ = 55468195679736. Its totient is φ = 9977830848000.

The previous prime is 25668769740979. The next prime is 25668769741003. The reversal of 25668769740980 is 8904796786652.

It can be written as a sum of positive squares in 12 ways, for example, as 112792535716 + 25555977205264 = 335846^2 + 5055292^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21908030 + ... + 23049930.

It is an arithmetic number, because the mean of its divisors is an integer number (770391606663).

Almost surely, 2^{25668769740980} is an apocalyptic number.

25668769740980 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 25668769740980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27734097839868).

25668769740980 is an abundant number, since it is smaller than the sum of its proper divisors (29799425938756).

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

25668769740980 is a wasteful number, since it uses less digits than its factorization.

25668769740980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142805 (or 1142766 counting only the distinct ones).

The product of its (nonzero) digits is 2194698240, while the sum is 77.

The spelling of 25668769740980 in words is "twenty-five trillion, six hundred sixty-eight billion, seven hundred sixty-nine million, seven hundred forty thousand, nine hundred eighty".