161458009 has 8 divisors (see below), whose sum is σ = 162745632. Its totient is φ = 160176000.

The previous prime is 161458001. The next prime is 161458069. The reversal of 161458009 is 900854161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161458009 - 2³ = 161458001 is a prime.

It is a super-4 number, since 4×161458009⁴ (a number of 34 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161458001) 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 7 ways as a sum of consecutive naturals, for example, 69897 + ... + 72169.

It is an arithmetic number, because the mean of its divisors is an integer number (20343204).

Almost surely, 2^161458009 is an apocalyptic number.

It is an amenable number.

161458009 is a deficient number, since it is larger than the sum of its proper divisors (1287623).

161458009 is a wasteful number, since it uses less digits than its factorization.

161458009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2807.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 161458009 is about 12706.6128059369. The cubic root of 161458009 is about 544.5275584792.

The spelling of 161458009 in words is "one hundred sixty-one million, four hundred fifty-eight thousand, nine".