3125641825 has 6 divisors (see below), whose sum is σ = 3875795894. Its totient is φ = 2500513440.

The previous prime is 3125641823. The next prime is 3125641843. The reversal of 3125641825 is 5281465213.

It can be written as a sum of positive squares in 3 ways, for example, as 186158736 + 2939483089 = 13644^2 + 54217^2 .

It is not a de Polignac number, because 3125641825 - 2¹ = 3125641823 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3125641823) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 62512812 + ... + 62512861.

Almost surely, 2^3125641825 is an apocalyptic number.

It is an amenable number.

3125641825 is a deficient number, since it is larger than the sum of its proper divisors (750154069).

3125641825 is a wasteful number, since it uses less digits than its factorization.

3125641825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125025683 (or 125025678 counting only the distinct ones).

The product of its digits is 57600, while the sum is 37.

The square root of 3125641825 is about 55907.4398000839. The cubic root of 3125641825 is about 1462.1089533314.

The spelling of 3125641825 in words is "three billion, one hundred twenty-five million, six hundred forty-one thousand, eight hundred twenty-five".