161880859 has 6 divisors (see below), whose sum is σ = 188310444. Its totient is φ = 138754980.

The previous prime is 161880857. The next prime is 161880863. The reversal of 161880859 is 958088161.

161880859 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161880859 - 2¹ = 161880857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161880857) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1651797 + ... + 1651894.

It is an arithmetic number, because the mean of its divisors is an integer number (31385074).

Almost surely, 2^161880859 is an apocalyptic number.

161880859 is a deficient number, since it is larger than the sum of its proper divisors (26429585).

161880859 is an equidigital number, since it uses as much as digits as its factorization.

161880859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3303705 (or 3303698 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 46.

The square root of 161880859 is about 12723.2409000223. The cubic root of 161880859 is about 545.0025070726.

The spelling of 161880859 in words is "one hundred sixty-one million, eight hundred eighty thousand, eight hundred fifty-nine".