215652210665 has 16 divisors (see below), whose sum is σ = 259780663296. Its totient is φ = 171856641600.

The previous prime is 215652210623. The next prime is 215652210671. The reversal of 215652210665 is 566012256512.

It is not a de Polignac number, because 215652210665 - 2⁸ = 215652210409 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12607859 + ... + 12624951.

It is an arithmetic number, because the mean of its divisors is an integer number (16236291456).

Almost surely, 2^215652210665 is an apocalyptic number.

It is an amenable number.

215652210665 is a deficient number, since it is larger than the sum of its proper divisors (44128452631).

215652210665 is a wasteful number, since it uses less digits than its factorization.

215652210665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26680.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 215652210665 in words is "two hundred fifteen billion, six hundred fifty-two million, two hundred ten thousand, six hundred sixty-five".