216044062868638 has 4 divisors (see below), whose sum is σ = 324066094302960. Its totient is φ = 108022031434318.

The previous prime is 216044062868581. The next prime is 216044062868693. The reversal of 216044062868638 is 836868260440612.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 216044062868638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54011015717158 + ... + 54011015717161.

It is an arithmetic number, because the mean of its divisors is an integer number (81016523575740).

Almost surely, 2^{216044062868638} is an apocalyptic number.

216044062868638 is a deficient number, since it is larger than the sum of its proper divisors (108022031434322).

216044062868638 is a wasteful number, since it uses less digits than its factorization.

216044062868638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108022031434321.

The product of its (nonzero) digits is 127401984, while the sum is 64.

The spelling of 216044062868638 in words is "two hundred sixteen trillion, forty-four billion, sixty-two million, eight hundred sixty-eight thousand, six hundred thirty-eight".