161858680 has 16 divisors (see below), whose sum is σ = 364182120. Its totient is φ = 64743456.

The previous prime is 161858677. The next prime is 161858699. The reversal of 161858680 is 86858161.

It is a happy number.

161858680 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2023194 + ... + 2023273.

Almost surely, 2^161858680 is an apocalyptic number.

161858680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161858680 is an abundant number, since it is smaller than the sum of its proper divisors (202323440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161858680 is a wasteful number, since it uses less digits than its factorization.

161858680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4046478 (or 4046474 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 43.

The square root of 161858680 is about 12722.3692762001. The cubic root of 161858680 is about 544.9776160040.

The spelling of 161858680 in words is "one hundred sixty-one million, eight hundred fifty-eight thousand, six hundred eighty".