161336158 has 4 divisors (see below), whose sum is σ = 242004240. Its totient is φ = 80668078.

The previous prime is 161336143. The next prime is 161336173. The reversal of 161336158 is 851633161.

161336158 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (161336143) and next prime (161336173).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 40334038 + ... + 40334041.

It is an arithmetic number, because the mean of its divisors is an integer number (60501060).

Almost surely, 2^161336158 is an apocalyptic number.

161336158 is a deficient number, since it is larger than the sum of its proper divisors (80668082).

161336158 is an equidigital number, since it uses as much as digits as its factorization.

161336158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80668081.

The product of its digits is 12960, while the sum is 34.

The square root of 161336158 is about 12701.8171140983. The cubic root of 161336158 is about 544.3905405500.

The spelling of 161336158 in words is "one hundred sixty-one million, three hundred thirty-six thousand, one hundred fifty-eight".