27161744738 has 6 divisors (see below), whose sum is σ = 40742966721. Its totient is φ = 13580755832.

The previous prime is 27161744711. The next prime is 27161744741. The reversal of 27161744738 is 83744716172.

It can be written as a sum of positive squares in 2 ways, for example, as 16113001969 + 11048742769 = 126937^2 + 105113^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=116537.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 174806 + ... + 291342.

Almost surely, 2^27161744738 is an apocalyptic number.

27161744738 is a deficient number, since it is larger than the sum of its proper divisors (13581221983).

27161744738 is an frugal number, since it uses more digits than its factorization.

27161744738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233076 (or 116539 counting only the distinct ones).

The product of its digits is 1580544, while the sum is 50.

Multiplying 27161744738 by its sum of digits (50), we get a square (1358087236900 = 1165370²).

The spelling of 27161744738 in words is "twenty-seven billion, one hundred sixty-one million, seven hundred forty-four thousand, seven hundred thirty-eight".