215860593664 has 33 divisors (see below), whose sum is σ = 431540108407. Its totient is φ = 107922863104.

The previous prime is 215860593653. The next prime is 215860593691. The reversal of 215860593664 is 466395068512.

The square root of 215860593664 is 464608.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 14860197 + ... + 14874715.

Almost surely, 2^215860593664 is an apocalyptic number.

215860593664 is the 464608-th square number.

It is an amenable number.

215860593664 is a deficient number, since it is larger than the sum of its proper divisors (215679514743).

215860593664 is an frugal number, since it uses more digits than its factorization.

215860593664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29058 (or 14521 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 55.

The spelling of 215860593664 in words is "two hundred fifteen billion, eight hundred sixty million, five hundred ninety-three thousand, six hundred sixty-four".