161880007186 has 16 divisors (see below), whose sum is σ = 253386157248. Its totient is φ = 77418198000.

The previous prime is 161880007169. The next prime is 161880007189. The reversal of 161880007186 is 681700088161.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (161880007189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2147536 + ... + 2221636.

It is an arithmetic number, because the mean of its divisors is an integer number (15836634828).

Almost surely, 2^161880007186 is an apocalyptic number.

161880007186 is a deficient number, since it is larger than the sum of its proper divisors (91506150062).

161880007186 is a wasteful number, since it uses less digits than its factorization.

161880007186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121617.

The product of its (nonzero) digits is 129024, while the sum is 46.

The spelling of 161880007186 in words is "one hundred sixty-one billion, eight hundred eighty million, seven thousand, one hundred eighty-six".