215656642016 has 48 divisors (see below), whose sum is σ = 426490251264. Its totient is φ = 107342246784.

The previous prime is 215656641983. The next prime is 215656642051. The reversal of 215656642016 is 610246656512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12977585 + ... + 12994191.

It is an arithmetic number, because the mean of its divisors is an integer number (8885213568).

Almost surely, 2^215656642016 is an apocalyptic number.

It is an amenable number.

215656642016 is a deficient number, since it is larger than the sum of its proper divisors (210833609248).

215656642016 is a wasteful number, since it uses less digits than its factorization.

215656642016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18423 (or 18415 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 215656642016 in words is "two hundred fifteen billion, six hundred fifty-six million, six hundred forty-two thousand, sixteen".