6172271618 has 18 divisors (see below), whose sum is σ = 9399323547. Its totient is φ = 3039860160.

The previous prime is 6172271593. The next prime is 6172271627. The reversal of 6172271618 is 8161722716.

It can be written as a sum of positive squares in 5 ways, for example, as 87179569 + 6085092049 = 9337^2 + 78007^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=55553.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 8110358 + ... + 8111118.

Almost surely, 2^6172271618 is an apocalyptic number.

6172271618 is a deficient number, since it is larger than the sum of its proper divisors (3227051929).

6172271618 is an frugal number, since it uses more digits than its factorization.

6172271618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1670 (or 836 counting only the distinct ones).

The product of its digits is 56448, while the sum is 41.

The square root of 6172271618 is about 78563.8060305125. The cubic root of 6172271618 is about 1834.3477716756.

Multiplying 6172271618 by its product of digits (56448), we get a square (348412388292864 = 18665808²).

The spelling of 6172271618 in words is "six billion, one hundred seventy-two million, two hundred seventy-one thousand, six hundred eighteen".