161373611 has 10 divisors (see below), whose sum is σ = 188260812. Its totient is φ = 138318180.

The previous prime is 161373599. The next prime is 161373617. The reversal of 161373611 is 116373161.

It is not a de Polignac number, because 161373611 - 2⁶ = 161373547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161373617) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 31205 + ... + 36006.

Almost surely, 2^161373611 is an apocalyptic number.

161373611 is a deficient number, since it is larger than the sum of its proper divisors (26887201).

161373611 is an frugal number, since it uses more digits than its factorization.

161373611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67239 (or 67218 counting only the distinct ones).

The product of its digits is 2268, while the sum is 29.

The square root of 161373611 is about 12703.2913451593. The cubic root of 161373611 is about 544.4326627080.

The spelling of 161373611 in words is "one hundred sixty-one million, three hundred seventy-three thousand, six hundred eleven".