215566216667016 has 64 divisors (see below), whose sum is σ = 557609482080000. Its totient is φ = 69363863686656.

The previous prime is 215566216666963. The next prime is 215566216667047. The reversal of 215566216667016 is 610766612665512.

It is a happy 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, 27225301 + ... + 34239588.

It is an arithmetic number, because the mean of its divisors is an integer number (8712648157500).

Almost surely, 2^{215566216667016} is an apocalyptic number.

It is an amenable number.

215566216667016 is an abundant number, since it is smaller than the sum of its proper divisors (342043265412984).

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

215566216667016 is a wasteful number, since it uses less digits than its factorization.

215566216667016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61469966 (or 61469962 counting only the distinct ones).

The product of its (nonzero) digits is 32659200, while the sum is 60.

The spelling of 215566216667016 in words is "two hundred fifteen trillion, five hundred sixty-six billion, two hundred sixteen million, six hundred sixty-seven thousand, sixteen".