181359164 has 12 divisors (see below), whose sum is σ = 362718384. Its totient is φ = 77725344.

The previous prime is 181359149. The next prime is 181359221. The reversal of 181359164 is 461953181.

181359164 is an admirable number.

It is a super-2 number, since 2×181359164² = 65782292733557792, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3238529 + ... + 3238584.

It is an arithmetic number, because the mean of its divisors is an integer number (30226532).

Almost surely, 2^181359164 is an apocalyptic number.

181359164 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

181359164 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.

181359164 is a wasteful number, since it uses less digits than its factorization.

181359164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6477124 (or 6477122 counting only the distinct ones).

The product of its digits is 25920, while the sum is 38.

The square root of 181359164 is about 13466.9656567469. The cubic root of 181359164 is about 566.0391911830.

The spelling of 181359164 in words is "one hundred eighty-one million, three hundred fifty-nine thousand, one hundred sixty-four".