161389046 has 32 divisors (see below), whose sum is σ = 304046400. Its totient is φ = 63842688.

The previous prime is 161389043. The next prime is 161389051. The reversal of 161389046 is 640983161.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161389043) 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 15 ways as a sum of consecutive naturals, for example, 131 + ... + 17966.

It is an arithmetic number, because the mean of its divisors is an integer number (9501450).

Almost surely, 2^161389046 is an apocalyptic number.

161389046 is a deficient number, since it is larger than the sum of its proper divisors (142657354).

161389046 is a wasteful number, since it uses less digits than its factorization.

161389046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18133 (or 18119 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 161389046 is about 12703.8988503530. The cubic root of 161389046 is about 544.4500200487.

The spelling of 161389046 in words is "one hundred sixty-one million, three hundred eighty-nine thousand, forty-six".