161458590 has 32 divisors (see below), whose sum is σ = 387878400. Its totient is φ = 43013664.

The previous prime is 161458579. The next prime is 161458607. The reversal of 161458590 is 95854161.

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 in 15 ways as a sum of consecutive naturals, for example, 40047 + ... + 43893.

It is an arithmetic number, because the mean of its divisors is an integer number (12121200).

Almost surely, 2^161458590 is an apocalyptic number.

161458590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161458590 is an abundant number, since it is smaller than the sum of its proper divisors (226419810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161458590 is a wasteful number, since it uses less digits than its factorization.

161458590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5256.

The product of its (nonzero) digits is 43200, while the sum is 39.

The square root of 161458590 is about 12706.6356680279. The cubic root of 161458590 is about 544.5282116317.

The spelling of 161458590 in words is "one hundred sixty-one million, four hundred fifty-eight thousand, five hundred ninety".