161860198 has 24 divisors (see below), whose sum is σ = 253135008. Its totient is φ = 77586912.

The previous prime is 161860189. The next prime is 161860201. The reversal of 161860198 is 891068161.

161860198 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 161860198.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 263740 + ... + 264352.

It is an arithmetic number, because the mean of its divisors is an integer number (10547292).

Almost surely, 2^161860198 is an apocalyptic number.

161860198 is a deficient number, since it is larger than the sum of its proper divisors (91274810).

161860198 is an equidigital number, since it uses as much as digits as its factorization.

161860198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768 (or 715 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 161860198 is about 12722.4289347593. The cubic root of 161860198 is about 544.9793196990.

It can be divided in two parts, 1618 and 60198, that added together give a palindrome (61816).

The spelling of 161860198 in words is "one hundred sixty-one million, eight hundred sixty thousand, one hundred ninety-eight".