161116087 has 4 divisors (see below), whose sum is σ = 175763016. Its totient is φ = 146469160.

The previous prime is 161116063. The next prime is 161116091. The reversal of 161116087 is 780611161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161116087 - 2¹⁵ = 161083319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161116097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7323448 + ... + 7323469.

It is an arithmetic number, because the mean of its divisors is an integer number (43940754).

Almost surely, 2^161116087 is an apocalyptic number.

161116087 is a deficient number, since it is larger than the sum of its proper divisors (14646929).

161116087 is a wasteful number, since it uses less digits than its factorization.

161116087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14646928.

The product of its (nonzero) digits is 2016, while the sum is 31.

The square root of 161116087 is about 12693.1511847925. The cubic root of 161116087 is about 544.1429021477.

The spelling of 161116087 in words is "one hundred sixty-one million, one hundred sixteen thousand, eighty-seven".