213999643878 has 8 divisors (see below), whose sum is σ = 427999287768. Its totient is φ = 71333214624.

The previous prime is 213999643757. The next prime is 213999643927. The reversal of 213999643878 is 878346999312.

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

213999643878 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17833303651 + ... + 17833303662.

It is an arithmetic number, because the mean of its divisors is an integer number (53499910971).

Almost surely, 2^213999643878 is an apocalyptic number.

213999643878 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.

213999643878 is a wasteful number, since it uses less digits than its factorization.

213999643878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35666607318.

The product of its digits is 141087744, while the sum is 69.

The spelling of 213999643878 in words is "two hundred thirteen billion, nine hundred ninety-nine million, six hundred forty-three thousand, eight hundred seventy-eight".