25835372672 has 24 divisors (see below), whose sum is σ = 51472529535. Its totient is φ = 12916777088.

The previous prime is 25835372611. The next prime is 25835372711. The reversal of 25835372672 is 27627353852.

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., 12917686336 + 12917686336 = 113656^2 + 113656^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=113656.

It is a super-2 number, since 2×25835372672² (a number of 22 digits) contains 22 as substring.

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 25835372672.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1811393 + ... + 1825599.

Almost surely, 2^25835372672 is an apocalyptic number.

It is an amenable number.

25835372672 is a deficient number, since it is larger than the sum of its proper divisors (25637156863).

25835372672 is an frugal number, since it uses more digits than its factorization.

25835372672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28428 (or 14209 counting only the distinct ones).

The product of its digits is 4233600, while the sum is 50.

Multiplying 25835372672 by its sum of digits (50), we get a square (1291768633600 = 1136560²).

The spelling of 25835372672 in words is "twenty-five billion, eight hundred thirty-five million, three hundred seventy-two thousand, six hundred seventy-two".