161880007187 has 8 divisors (see below), whose sum is σ = 162032596800. Its totient is φ = 161727477120.

The previous prime is 161880007169. The next prime is 161880007189. The reversal of 161880007187 is 781700088161.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161880007187 - 2¹⁴ = 161879990803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161880007189) 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 7 ways as a sum of consecutive naturals, for example, 6847814 + ... + 6871412.

It is an arithmetic number, because the mean of its divisors is an integer number (20254074600).

Almost surely, 2^161880007187 is an apocalyptic number.

161880007187 is a deficient number, since it is larger than the sum of its proper divisors (152589613).

161880007187 is a wasteful number, since it uses less digits than its factorization.

161880007187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29773.

The product of its (nonzero) digits is 150528, while the sum is 47.

The spelling of 161880007187 in words is "one hundred sixty-one billion, eight hundred eighty million, seven thousand, one hundred eighty-seven".