161868886 has 8 divisors (see below), whose sum is σ = 246129624. Its totient is φ = 79825680.

The previous prime is 161868881. The next prime is 161868901. The reversal of 161868886 is 688868161.

161868886 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161868881) 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, 554200 + ... + 554491.

It is an arithmetic number, because the mean of its divisors is an integer number (30766203).

Almost surely, 2^161868886 is an apocalyptic number.

161868886 is a deficient number, since it is larger than the sum of its proper divisors (84260738).

161868886 is a wasteful number, since it uses less digits than its factorization.

161868886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108766.

The product of its digits is 884736, while the sum is 52.

The square root of 161868886 is about 12722.7703744114. The cubic root of 161868886 is about 544.9890702855.

The spelling of 161868886 in words is "one hundred sixty-one million, eight hundred sixty-eight thousand, eight hundred eighty-six".