196618181 has 8 divisors (see below), whose sum is σ = 200924064. Its totient is φ = 192334480.

The previous prime is 196618139. The next prime is 196618183. The reversal of 196618181 is 181816691.

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 196618181 - 2⁶ = 196618117 is a prime.

It is a super-2 number, since 2×196618181² = 77317418199497522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196618183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13046 + ... + 23736.

It is an arithmetic number, because the mean of its divisors is an integer number (25115508).

Almost surely, 2^196618181 is an apocalyptic number.

It is an amenable number.

196618181 is a deficient number, since it is larger than the sum of its proper divisors (4305883).

196618181 is a wasteful number, since it uses less digits than its factorization.

196618181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11091.

The product of its digits is 20736, while the sum is 41.

The square root of 196618181 is about 14022.0605119219. The cubic root of 196618181 is about 581.4886264822.

The spelling of 196618181 in words is "one hundred ninety-six million, six hundred eighteen thousand, one hundred eighty-one".