161613258 has 8 divisors (see below), whose sum is σ = 323226528. Its totient is φ = 53871084.

The previous prime is 161613251. The next prime is 161613281. The reversal of 161613258 is 852316161.

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

161613258 is an admirable number.

It is a super-2 number, since 2×161613258² = 52237690322749128, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (161613251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13467766 + ... + 13467777.

It is an arithmetic number, because the mean of its divisors is an integer number (40403316).

Almost surely, 2^161613258 is an apocalyptic number.

161613258 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

161613258 is a wasteful number, since it uses less digits than its factorization.

161613258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26935548.

The product of its digits is 8640, while the sum is 33.

The square root of 161613258 is about 12712.7203225746. The cubic root of 161613258 is about 544.7020316615.

The spelling of 161613258 in words is "one hundred sixty-one million, six hundred thirteen thousand, two hundred fifty-eight".