161883646 has 8 divisors (see below), whose sum is σ = 242907840. Its totient is φ = 80914368.

The previous prime is 161883619. The next prime is 161883647. The reversal of 161883646 is 646388161.

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 not an unprimeable number, because it can be changed into a prime (161883647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5331 + ... + 18766.

It is an arithmetic number, because the mean of its divisors is an integer number (30363480).

Almost surely, 2^161883646 is an apocalyptic number.

161883646 is a deficient number, since it is larger than the sum of its proper divisors (81024194).

161883646 is a wasteful number, since it uses less digits than its factorization.

161883646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27458.

The product of its digits is 165888, while the sum is 43.

The square root of 161883646 is about 12723.3504235323. The cubic root of 161883646 is about 545.0056347087.

It can be divided in two parts, 1618 and 83646, that added together give a square (85264 = 292²).

The spelling of 161883646 in words is "one hundred sixty-one million, eight hundred eighty-three thousand, six hundred forty-six".