25865544925440 has 432 divisors, whose sum is σ = 102766047209280. Its totient is φ = 5940411678720.

The previous prime is 25865544925439. The next prime is 25865544925457. The reversal of 25865544925440 is 4452944556852.

25865544925440 is a `hidden beast` number, since 2 + 5 + 8 + 6 + 5 + 54 + 492 + 54 + 40 = 666.

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, 2963787 + ... + 7779146.

It is an arithmetic number, because the mean of its divisors is an integer number (237884368540).

Almost surely, 2^{25865544925440} is an apocalyptic number.

25865544925440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25865544925440 is an abundant number, since it is smaller than the sum of its proper divisors (76900502283840).

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

25865544925440 is a wasteful number, since it uses less digits than its factorization.

25865544925440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10742990 (or 10742973 counting only the distinct ones).

The product of its (nonzero) digits is 276480000, while the sum is 63.

The spelling of 25865544925440 in words is "twenty-five trillion, eight hundred sixty-five billion, five hundred forty-four million, nine hundred twenty-five thousand, four hundred forty".