3161278625 has 16 divisors (see below), whose sum is σ = 3947121360. Its totient is φ = 2527840000.

The previous prime is 3161278607. The next prime is 3161278633. The reversal of 3161278625 is 5268721613.

It can be written as a sum of positive squares in 8 ways, for example, as 162511504 + 2998767121 = 12748^2 + 54761^2 .

It is not a de Polignac number, because 3161278625 - 2¹⁴ = 3161262241 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 345611 + ... + 354639.

It is an arithmetic number, because the mean of its divisors is an integer number (246695085).

Almost surely, 2^3161278625 is an apocalyptic number.

It is an amenable number.

3161278625 is a deficient number, since it is larger than the sum of its proper divisors (785842735).

3161278625 is an equidigital number, since it uses as much as digits as its factorization.

3161278625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11845 (or 11835 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The square root of 3161278625 is about 56225.2489990040. The cubic root of 3161278625 is about 1467.6446809924.

The spelling of 3161278625 in words is "three billion, one hundred sixty-one million, two hundred seventy-eight thousand, six hundred twenty-five".