25445060728 has 32 divisors (see below), whose sum is σ = 49024263600. Its totient is φ = 12372279552.

The previous prime is 25445060687. The next prime is 25445060731. The reversal of 25445060728 is 82706054452.

It is a happy number.

It is a super-2 number, since 2×25445060728² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 578788 + ... + 621196.

Almost surely, 2^25445060728 is an apocalyptic number.

It is an amenable number.

25445060728 is a deficient number, since it is larger than the sum of its proper divisors (23579202872).

25445060728 is a wasteful number, since it uses less digits than its factorization.

25445060728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44479 (or 44475 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 43.

The spelling of 25445060728 in words is "twenty-five billion, four hundred forty-five million, sixty thousand, seven hundred twenty-eight".