161890894 has 16 divisors (see below), whose sum is σ = 268868736. Its totient is φ = 72487800.

The previous prime is 161890877. The next prime is 161890903. The reversal of 161890894 is 498098161.

161890894 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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53442 + ... + 56389.

It is an arithmetic number, because the mean of its divisors is an integer number (16804296).

Almost surely, 2^161890894 is an apocalyptic number.

161890894 is a deficient number, since it is larger than the sum of its proper divisors (106977842).

161890894 is a wasteful number, since it uses less digits than its factorization.

161890894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109911.

The product of its (nonzero) digits is 124416, while the sum is 46.

The square root of 161890894 is about 12723.6352509808. The cubic root of 161890894 is about 545.0137684146.

The spelling of 161890894 in words is "one hundred sixty-one million, eight hundred ninety thousand, eight hundred ninety-four".