3128750688225 has 12 divisors (see below), whose sum is σ = 5172867804656. Its totient is φ = 1668667033680.

The previous prime is 3128750688221. The next prime is 3128750688247. The reversal of 3128750688225 is 5228860578213.

It is not a de Polignac number, because 3128750688225 - 2² = 3128750688221 is a prime.

It is a super-2 number, since 2×3128750688225² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3128750688221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20858337847 + ... + 20858337996.

Almost surely, 2^{3128750688225} is an apocalyptic number.

It is an amenable number.

3128750688225 is a deficient number, since it is larger than the sum of its proper divisors (2044117116431).

3128750688225 is a wasteful number, since it uses less digits than its factorization.

3128750688225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41716675856 (or 41716675851 counting only the distinct ones).

The product of its (nonzero) digits is 12902400, while the sum is 57.

The spelling of 3128750688225 in words is "three trillion, one hundred twenty-eight billion, seven hundred fifty million, six hundred eighty-eight thousand, two hundred twenty-five".