161566059 has 4 divisors (see below), whose sum is σ = 215421416. Its totient is φ = 107710704.

The previous prime is 161566051. The next prime is 161566073. The reversal of 161566059 is 950665161.

161566059 is digitally balanced in base 2, 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 not a de Polignac number, because 161566059 - 2³ = 161566051 is a prime.

It is a super-2 number, since 2×161566059² = 52207182841582962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161566051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26927674 + ... + 26927679.

It is an arithmetic number, because the mean of its divisors is an integer number (53855354).

Almost surely, 2^161566059 is an apocalyptic number.

161566059 is a deficient number, since it is larger than the sum of its proper divisors (53855357).

161566059 is an equidigital number, since it uses as much as digits as its factorization.

161566059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53855356.

The product of its (nonzero) digits is 48600, while the sum is 39.

The square root of 161566059 is about 12710.8638180102. The cubic root of 161566059 is about 544.6489999265.

The spelling of 161566059 in words is "one hundred sixty-one million, five hundred sixty-six thousand, fifty-nine".