25747367856 has 320 divisors, whose sum is σ = 81604300800. Its totient is φ = 6832677888.

The previous prime is 25747367809. The next prime is 25747367873. The reversal of 25747367856 is 65876374752.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 25747367856.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 113424415 + ... + 113424641.

It is an arithmetic number, because the mean of its divisors is an integer number (255013440).

Almost surely, 2^25747367856 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 25747367856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40802150400).

25747367856 is an abundant number, since it is smaller than the sum of its proper divisors (55856932944).

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

25747367856 is a wasteful number, since it uses less digits than its factorization.

25747367856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536 (or 530 counting only the distinct ones).

The product of its digits is 59270400, while the sum is 60.

The spelling of 25747367856 in words is "twenty-five billion, seven hundred forty-seven million, three hundred sixty-seven thousand, eight hundred fifty-six".