25823227720 has 16 divisors (see below), whose sum is σ = 58102262460. Its totient is φ = 10329291072.

The previous prime is 25823227711. The next prime is 25823227733. The reversal of 25823227720 is 2772232852.

It can be written as a sum of positive squares in 2 ways, for example, as 25021545124 + 801682596 = 158182^2 + 28314^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 645580693 = 25823227720 / (2 + 5 + 8 + 2 + 3 + 2 + 2 + 7 + 7 + 2 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322790307 + ... + 322790386.

Almost surely, 2^25823227720 is an apocalyptic number.

25823227720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25823227720 is an abundant number, since it is smaller than the sum of its proper divisors (32279034740).

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

25823227720 is a wasteful number, since it uses less digits than its factorization.

25823227720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645580704 (or 645580700 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 40.

The spelling of 25823227720 in words is "twenty-five billion, eight hundred twenty-three million, two hundred twenty-seven thousand, seven hundred twenty".