27812216688 has 40 divisors (see below), whose sum is σ = 71947145088. Its totient is φ = 9257975232.

The previous prime is 27812216687. The next prime is 27812216693. The reversal of 27812216688 is 88661221872.

It is a self number, because there is not a number n which added to its sum of digits gives 27812216688.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27812216681) 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, 363606 + ... + 433397.

Almost surely, 2^27812216688 is an apocalyptic number.

It is an amenable number.

27812216688 is an abundant number, since it is smaller than the sum of its proper divisors (44134928400).

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

27812216688 is a wasteful number, since it uses less digits than its factorization.

27812216688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797741 (or 797735 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 51.

The spelling of 27812216688 in words is "twenty-seven billion, eight hundred twelve million, two hundred sixteen thousand, six hundred eighty-eight".