161608258 has 16 divisors (see below), whose sum is σ = 289088640. Its totient is φ = 66249216.

The previous prime is 161608241. The next prime is 161608261. The reversal of 161608258 is 852806161.

161608258 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×161608258³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250623 + ... + 251266.

It is an arithmetic number, because the mean of its divisors is an integer number (18068040).

Almost surely, 2^161608258 is an apocalyptic number.

161608258 is a deficient number, since it is larger than the sum of its proper divisors (127480382).

161608258 is a wasteful number, since it uses less digits than its factorization.

161608258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501921.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 161608258 is about 12712.5236676279. The cubic root of 161608258 is about 544.6964142629.

The spelling of 161608258 in words is "one hundred sixty-one million, six hundred eight thousand, two hundred fifty-eight".