215896439166 has 8 divisors (see below), whose sum is σ = 431792878344. Its totient is φ = 71965479720.

The previous prime is 215896439149. The next prime is 215896439191. The reversal of 215896439166 is 661934698512.

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

215896439166 is an admirable number.

It is a super-2 number, since 2×215896439166² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

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, 17991369925 + ... + 17991369936.

It is an arithmetic number, because the mean of its divisors is an integer number (53974109793).

Almost surely, 2^215896439166 is an apocalyptic number.

215896439166 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.

215896439166 is a wasteful number, since it uses less digits than its factorization.

215896439166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35982739866.

The product of its digits is 16796160, while the sum is 60.

The spelling of 215896439166 in words is "two hundred fifteen billion, eight hundred ninety-six million, four hundred thirty-nine thousand, one hundred sixty-six".