161837146 has 4 divisors (see below), whose sum is σ = 242755722. Its totient is φ = 80918572.

The previous prime is 161837113. The next prime is 161837167. The reversal of 161837146 is 641738161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 140778225 + 21058921 = 11865^2 + 4589^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40459285 + ... + 40459288.

Almost surely, 2^161837146 is an apocalyptic number.

161837146 is a deficient number, since it is larger than the sum of its proper divisors (80918576).

161837146 is an equidigital number, since it uses as much as digits as its factorization.

161837146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80918575.

The product of its digits is 24192, while the sum is 37.

The square root of 161837146 is about 12721.5229434215. The cubic root of 161837146 is about 544.9534466310.

The spelling of 161837146 in words is "one hundred sixty-one million, eight hundred thirty-seven thousand, one hundred forty-six".