27161665722 has 12 divisors (see below), whose sum is σ = 58850275770. Its totient is φ = 9053888568.

The previous prime is 27161665717. The next prime is 27161665757. The reversal of 27161665722 is 22756616172.

27161665722 is a `hidden beast` number, since 2 + 7 + 1 + 616 + 6 + 5 + 7 + 22 = 666.

It can be written as a sum of positive squares in only one way, i.e., 26289703881 + 871961841 = 162141^2 + 29529^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 754490697 + ... + 754490732.

Almost surely, 2^27161665722 is an apocalyptic number.

27161665722 is an abundant number, since it is smaller than the sum of its proper divisors (31688610048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27161665722 is a wasteful number, since it uses less digits than its factorization.

27161665722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1508981437 (or 1508981434 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The spelling of 27161665722 in words is "twenty-seven billion, one hundred sixty-one million, six hundred sixty-five thousand, seven hundred twenty-two".