161188863 has 8 divisors (see below), whose sum is σ = 234456576. Its totient is φ = 97690200.

The previous prime is 161188843. The next prime is 161188889. The reversal of 161188863 is 368881161.

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

It is not a de Polignac number, because 161188863 - 2⁵ = 161188831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161188813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2442223 + ... + 2442288.

It is an arithmetic number, because the mean of its divisors is an integer number (29307072).

Almost surely, 2^161188863 is an apocalyptic number.

161188863 is a deficient number, since it is larger than the sum of its proper divisors (73267713).

161188863 is a wasteful number, since it uses less digits than its factorization.

161188863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4884525.

The product of its digits is 55296, while the sum is 42.

The square root of 161188863 is about 12696.0176039575. The cubic root of 161188863 is about 544.2248194443.

The spelling of 161188863 in words is "one hundred sixty-one million, one hundred eighty-eight thousand, eight hundred sixty-three".