215565592068 has 72 divisors (see below), whose sum is σ = 552756780576. Its totient is φ = 70820784000.

The previous prime is 215565592043. The next prime is 215565592069. The reversal of 215565592068 is 860295565512.

It is a happy number.

215565592068 is a `hidden beast` number, since 2 + 1 + 5 + 5 + 6 + 559 + 20 + 68 = 666.

It is not an unprimeable number, because it can be changed into a prime (215565592069) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3784963 + ... + 3841493.

It is an arithmetic number, because the mean of its divisors is an integer number (7677177508).

Almost surely, 2^215565592068 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 215565592068, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276378390288).

215565592068 is an abundant number, since it is smaller than the sum of its proper divisors (337191188508).

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

215565592068 is a wasteful number, since it uses less digits than its factorization.

215565592068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58065 (or 58060 counting only the distinct ones).

The product of its (nonzero) digits is 6480000, while the sum is 54.

The spelling of 215565592068 in words is "two hundred fifteen billion, five hundred sixty-five million, five hundred ninety-two thousand, sixty-eight".