25868781456 has 40 divisors (see below), whose sum is σ = 76374498624. Its totient is φ = 7391080320.

The previous prime is 25868781443. The next prime is 25868781469. The reversal of 25868781456 is 65418786852.

It is an interprime number because it is at equal distance from previous prime (25868781443) and next prime (25868781469).

It is a self number, because there is not a number n which added to its sum of digits gives 25868781456.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38494875 + ... + 38495546.

Almost surely, 2^25868781456 is an apocalyptic number.

It is an amenable number.

25868781456 is an abundant number, since it is smaller than the sum of its proper divisors (50505717168).

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

25868781456 is a wasteful number, since it uses less digits than its factorization.

25868781456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76990439 (or 76990433 counting only the distinct ones).

The product of its digits is 25804800, while the sum is 60.

The spelling of 25868781456 in words is "twenty-five billion, eight hundred sixty-eight million, seven hundred eighty-one thousand, four hundred fifty-six".