25840268216 has 24 divisors (see below), whose sum is σ = 55374581160. Its totient is φ = 11073885120.

The previous prime is 25840268189. The next prime is 25840268281. The reversal of 25840268216 is 61286204852.

It is a super-2 number, since 2×25840268216² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1192196 + ... + 1213676.

It is an arithmetic number, because the mean of its divisors is an integer number (2307274215).

Almost surely, 2^25840268216 is an apocalyptic number.

It is an amenable number.

25840268216 is an abundant number, since it is smaller than the sum of its proper divisors (29534312944).

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

25840268216 is an frugal number, since it uses more digits than its factorization.

25840268216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42975 (or 21490 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 44.

The spelling of 25840268216 in words is "twenty-five billion, eight hundred forty million, two hundred sixty-eight thousand, two hundred sixteen".