25281651456 has 108 divisors (see below), whose sum is σ = 77181190632. Its totient is φ = 7931486208.

The previous prime is 25281651431. The next prime is 25281651457. The reversal of 25281651456 is 65415618252.

25281651456 is a `hidden beast` number, since 2 + 5 + 2 + 81 + 6 + 514 + 56 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (25281651457) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 283566 + ... + 361901.

It is an arithmetic number, because the mean of its divisors is an integer number (714640654).

Almost surely, 2^25281651456 is an apocalyptic number.

It is an amenable number.

25281651456 is an abundant number, since it is smaller than the sum of its proper divisors (51899539176).

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

25281651456 is a wasteful number, since it uses less digits than its factorization.

25281651456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645506 (or 645489 counting only the distinct ones).

The product of its digits is 576000, while the sum is 45.

The spelling of 25281651456 in words is "twenty-five billion, two hundred eighty-one million, six hundred fifty-one thousand, four hundred fifty-six".