161452646 has 4 divisors (see below), whose sum is σ = 242178972. Its totient is φ = 80726322.

The previous prime is 161452637. The next prime is 161452691. The reversal of 161452646 is 646254161.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40363160 + ... + 40363163.

It is an arithmetic number, because the mean of its divisors is an integer number (60544743).

Almost surely, 2^161452646 is an apocalyptic number.

161452646 is a deficient number, since it is larger than the sum of its proper divisors (80726326).

161452646 is an equidigital number, since it uses as much as digits as its factorization.

161452646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80726325.

The product of its digits is 34560, while the sum is 35.

The square root of 161452646 is about 12706.4017723351. The cubic root of 161452646 is about 544.5215293912.

The spelling of 161452646 in words is "one hundred sixty-one million, four hundred fifty-two thousand, six hundred forty-six".