25718428928 has 36 divisors (see below), whose sum is σ = 52305034068. Its totient is φ = 12616581120.

The previous prime is 25718428919. The next prime is 25718428987. The reversal of 25718428928 is 82982481752.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11310747904 + 14407681024 = 106352^2 + 120032^2 .

It is a super-2 number, since 2×25718428928² (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 3 ways as a sum of consecutive naturals, for example, 934193 + ... + 961328.

It is an arithmetic number, because the mean of its divisors is an integer number (1452917613).

Almost surely, 2^25718428928 is an apocalyptic number.

It is an amenable number.

25718428928 is an abundant number, since it is smaller than the sum of its proper divisors (26586605140).

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

25718428928 is an equidigital number, since it uses as much as digits as its factorization.

25718428928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1895590 (or 1895576 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 56.

The spelling of 25718428928 in words is "twenty-five billion, seven hundred eighteen million, four hundred twenty-eight thousand, nine hundred twenty-eight".