215651024656 has 20 divisors (see below), whose sum is σ = 417977612800. Its totient is φ = 107785834272.

The previous prime is 215651024653. The next prime is 215651024747. The reversal of 215651024656 is 656420156512.

It is not an unprimeable number, because it can be changed into a prime (215651024653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2435016 + ... + 2522023.

It is an arithmetic number, because the mean of its divisors is an integer number (20898880640).

Almost surely, 2^215651024656 is an apocalyptic number.

It is an amenable number.

215651024656 is a deficient number, since it is larger than the sum of its proper divisors (202326588144).

215651024656 is a wasteful number, since it uses less digits than its factorization.

215651024656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4959766 (or 4959760 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 43.

The spelling of 215651024656 in words is "two hundred fifteen billion, six hundred fifty-one million, twenty-four thousand, six hundred fifty-six".