161999846 has 8 divisors (see below), whose sum is σ = 243231984. Its totient is φ = 80922520.

The previous prime is 161999821. The next prime is 161999857. The reversal of 161999846 is 648999161.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36050 + ... + 40293.

It is an arithmetic number, because the mean of its divisors is an integer number (30403998).

Almost surely, 2^161999846 is an apocalyptic number.

161999846 is a deficient number, since it is larger than the sum of its proper divisors (81232138).

161999846 is a wasteful number, since it uses less digits than its factorization.

161999846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77406.

The product of its digits is 839808, while the sum is 53.

The square root of 161999846 is about 12727.9160116651. The cubic root of 161999846 is about 545.1360051110.

The spelling of 161999846 in words is "one hundred sixty-one million, nine hundred ninety-nine thousand, eight hundred forty-six".