215855037712 has 40 divisors (see below), whose sum is σ = 421066800000. Its totient is φ = 107193695232.

The previous prime is 215855037679. The next prime is 215855037731. The reversal of 215855037712 is 217730558512.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3304989 + ... + 3369667.

It is an arithmetic number, because the mean of its divisors is an integer number (10526670000).

Almost surely, 2^215855037712 is an apocalyptic number.

It is an amenable number.

215855037712 is a deficient number, since it is larger than the sum of its proper divisors (205211762288).

215855037712 is a wasteful number, since it uses less digits than its factorization.

215855037712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66103 (or 66097 counting only the distinct ones).

The product of its (nonzero) digits is 588000, while the sum is 46.

The spelling of 215855037712 in words is "two hundred fifteen billion, eight hundred fifty-five million, thirty-seven thousand, seven hundred twelve".