25814781133 has 4 divisors (see below), whose sum is σ = 25838400508. Its totient is φ = 25791161760.

The previous prime is 25814781127. The next prime is 25814781137. The reversal of 25814781133 is 33118741852.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11950425124 + 13864356009 = 109318^2 + 117747^2 .

It is a cyclic number.

It is not a de Polignac number, because 25814781133 - 2²⁹ = 25277910221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25814781133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25814781137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11808048 + ... + 11810233.

It is an arithmetic number, because the mean of its divisors is an integer number (6459600127).

Almost surely, 2^25814781133 is an apocalyptic number.

It is an amenable number.

25814781133 is a deficient number, since it is larger than the sum of its proper divisors (23619375).

25814781133 is a wasteful number, since it uses less digits than its factorization.

25814781133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23619374.

The product of its digits is 161280, while the sum is 43.

The spelling of 25814781133 in words is "twenty-five billion, eight hundred fourteen million, seven hundred eighty-one thousand, one hundred thirty-three".