215666013936 has 40 divisors (see below), whose sum is σ = 557154099280. Its totient is φ = 71886491136.

The previous prime is 215666013917. The next prime is 215666013961. The reversal of 215666013936 is 639310666512.

215666013936 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2644620 + ... + 2724948.

It is an arithmetic number, because the mean of its divisors is an integer number (13928852482).

Almost surely, 2^215666013936 is an apocalyptic number.

It is an amenable number.

215666013936 is an abundant number, since it is smaller than the sum of its proper divisors (341488085344).

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

215666013936 is a wasteful number, since it uses less digits than its factorization.

215666013936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136273 (or 136267 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 48.

The spelling of 215666013936 in words is "two hundred fifteen billion, six hundred sixty-six million, thirteen thousand, nine hundred thirty-six".