161108190 has 40 divisors (see below), whose sum is σ = 433204200. Its totient is φ = 42961968.

The previous prime is 161108183. The next prime is 161108191. The reversal of 161108190 is 91801161.

161108190 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161108190² = 51911697770152200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161108191) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 98640 + ... + 100259.

It is an arithmetic number, because the mean of its divisors is an integer number (10830105).

Almost surely, 2^161108190 is an apocalyptic number.

161108190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161108190 is an abundant number, since it is smaller than the sum of its proper divisors (272096010).

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

161108190 is a wasteful number, since it uses less digits than its factorization.

161108190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198918 (or 198909 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 27.

The square root of 161108190 is about 12692.8401077143. The cubic root of 161108190 is about 544.1340117326.

The spelling of 161108190 in words is "one hundred sixty-one million, one hundred eight thousand, one hundred ninety".