25715798928 has 60 divisors (see below), whose sum is σ = 73723867308. Its totient is φ = 8362859520.

The previous prime is 25715798917. The next prime is 25715798939. The reversal of 25715798928 is 82989751752.

25715798928 is a `hidden beast` number, since 2 + 57 + 1 + 579 + 8 + 9 + 2 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (25715798917) and next prime (25715798939).

It can be written as a sum of positive squares in 2 ways, for example, as 9410552064 + 16305246864 = 97008^2 + 127692^2 .

It is a super-2 number, since 2×25715798928² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2171925 + ... + 2183732.

Almost surely, 2^25715798928 is an apocalyptic number.

It is an amenable number.

25715798928 is an abundant number, since it is smaller than the sum of its proper divisors (48008068380).

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

25715798928 is a wasteful number, since it uses less digits than its factorization.

25715798928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4355712 (or 4355703 counting only the distinct ones).

The product of its digits is 25401600, while the sum is 63.

The spelling of 25715798928 in words is "twenty-five billion, seven hundred fifteen million, seven hundred ninety-eight thousand, nine hundred twenty-eight".