25287340806 has 128 divisors (see below), whose sum is σ = 72802329600. Its totient is φ = 6318155520.

The previous prime is 25287340753. The next prime is 25287340849. The reversal of 25287340806 is 60804378252.

25287340806 is a `hidden beast` number, since 2 + 528 + 7 + 3 + 40 + 80 + 6 = 666.

It is a congruent number.

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, 42055 + ... + 228786.

It is an arithmetic number, because the mean of its divisors is an integer number (568768200).

Almost surely, 2^25287340806 is an apocalyptic number.

25287340806 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

25287340806 is an abundant number, since it is smaller than the sum of its proper divisors (47514988794).

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

25287340806 is a wasteful number, since it uses less digits than its factorization.

25287340806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270891 (or 270885 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 25287340806 in words is "twenty-five billion, two hundred eighty-seven million, three hundred forty thousand, eight hundred six".