215606711832 has 128 divisors (see below), whose sum is σ = 553178419200. Its totient is φ = 70006092800.

The previous prime is 215606711813. The next prime is 215606711833. The reversal of 215606711832 is 238117606512.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215606711833) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75996718 + ... + 75999554.

It is an arithmetic number, because the mean of its divisors is an integer number (4321706400).

Almost surely, 2^215606711832 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 215606711832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276589209600).

215606711832 is an abundant number, since it is smaller than the sum of its proper divisors (337571707368).

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

215606711832 is a wasteful number, since it uses less digits than its factorization.

215606711832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3377 (or 3373 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 215606711832 in words is "two hundred fifteen billion, six hundred six million, seven hundred eleven thousand, eight hundred thirty-two".