212389618647894 has 32 divisors (see below), whose sum is σ = 424852091712000. Its totient is φ = 70784398068384.

The previous prime is 212389618647821. The next prime is 212389618647917. The reversal of 212389618647894 is 498746816983212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1055833977 + ... + 1056035115.

It is an arithmetic number, because the mean of its divisors is an integer number (13276627866000).

Almost surely, 2^{212389618647894} is an apocalyptic number.

212389618647894 is an abundant number, since it is smaller than the sum of its proper divisors (212462473064106).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212389618647894 is a wasteful number, since it uses less digits than its factorization.

212389618647894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230452.

The product of its digits is 2006581248, while the sum is 78.

The spelling of 212389618647894 in words is "two hundred twelve trillion, three hundred eighty-nine billion, six hundred eighteen million, six hundred forty-seven thousand, eight hundred ninety-four".