25113990728 has 36 divisors (see below), whose sum is σ = 48246313635. Its totient is φ = 12255559344.

The previous prime is 25113990721. The next prime is 25113990731. The reversal of 25113990728 is 82709931152.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 12556995364 + 12556995364 = 112058^2 + 112058^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=112058.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25113990721) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 19273325 + ... + 19274627.

Almost surely, 2^25113990728 is an apocalyptic number.

It is an amenable number.

25113990728 is a deficient number, since it is larger than the sum of its proper divisors (23132322907).

25113990728 is an frugal number, since it uses more digits than its factorization.

25113990728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2698 (or 1348 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 47.

The spelling of 25113990728 in words is "twenty-five billion, one hundred thirteen million, nine hundred ninety thousand, seven hundred twenty-eight".