161598894 has 16 divisors (see below), whose sum is σ = 324552960. Its totient is φ = 53640440.

The previous prime is 161598881. The next prime is 161598901. The reversal of 161598894 is 498895161.

It is a super-2 number, since 2×161598894² = 52228405084046472, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54912 + ... + 57779.

It is an arithmetic number, because the mean of its divisors is an integer number (20284560).

Almost surely, 2^161598894 is an apocalyptic number.

161598894 is an abundant number, since it is smaller than the sum of its proper divisors (162954066).

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

161598894 is a wasteful number, since it uses less digits than its factorization.

161598894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112935.

The product of its digits is 622080, while the sum is 51.

The square root of 161598894 is about 12712.1553640600. The cubic root of 161598894 is about 544.6858936872.

The spelling of 161598894 in words is "one hundred sixty-one million, five hundred ninety-eight thousand, eight hundred ninety-four".