27217865712 has 80 divisors (see below), whose sum is σ = 74308993920. Its totient is φ = 8560800000.

The previous prime is 27217865707. The next prime is 27217865743. The reversal of 27217865712 is 21756871272.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 169462 + ... + 288362.

It is an arithmetic number, because the mean of its divisors is an integer number (928862424).

Almost surely, 2^27217865712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27217865712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37154496960).

27217865712 is an abundant number, since it is smaller than the sum of its proper divisors (47091128208).

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

27217865712 is a wasteful number, since it uses less digits than its factorization.

27217865712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119182 (or 119176 counting only the distinct ones).

The product of its digits is 658560, while the sum is 48.

The spelling of 27217865712 in words is "twenty-seven billion, two hundred seventeen million, eight hundred sixty-five thousand, seven hundred twelve".