161937846 has 80 divisors (see below), whose sum is σ = 420150000. Its totient is φ = 46230912.

The previous prime is 161937833. The next prime is 161937847. The reversal of 161937846 is 648739161.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161937847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 129030 + ... + 130278.

It is an arithmetic number, because the mean of its divisors is an integer number (5251875).

Almost surely, 2^161937846 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161937846, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210075000).

161937846 is an abundant number, since it is smaller than the sum of its proper divisors (258212154).

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

161937846 is an equidigital number, since it uses as much as digits as its factorization.

161937846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288 (or 1261 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 161937846 is about 12725.4801874035. The cubic root of 161937846 is about 545.0664520717.

The spelling of 161937846 in words is "one hundred sixty-one million, nine hundred thirty-seven thousand, eight hundred forty-six".