215656366531016 has 32 divisors (see below), whose sum is σ = 418299870081600. Its totient is φ = 104109750212160.

The previous prime is 215656366530977. The next prime is 215656366531019. The reversal of 215656366531016 is 610135663656512.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (215656366531019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184563581 + ... + 185728371.

It is an arithmetic number, because the mean of its divisors is an integer number (13071870940050).

Almost surely, 2^{215656366531016} is an apocalyptic number.

It is an amenable number.

215656366531016 is a deficient number, since it is larger than the sum of its proper divisors (202643503550584).

215656366531016 is a wasteful number, since it uses less digits than its factorization.

215656366531016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1962869 (or 1962865 counting only the distinct ones).

The product of its (nonzero) digits is 17496000, while the sum is 56.

The spelling of 215656366531016 in words is "two hundred fifteen trillion, six hundred fifty-six billion, three hundred sixty-six million, five hundred thirty-one thousand, sixteen".