215530661056466 has 16 divisors (see below), whose sum is σ = 369652745522304. Its totient is φ = 92327380239264.

The previous prime is 215530661056457. The next prime is 215530661056471. The reversal of 215530661056466 is 664650166035512.

It is a super-2 number, since 2×215530661056466² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

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, 3575224670 + ... + 3575284953.

It is an arithmetic number, because the mean of its divisors is an integer number (23103296595144).

Almost surely, 2^{215530661056466} is an apocalyptic number.

215530661056466 is a deficient number, since it is larger than the sum of its proper divisors (154122084465838).

215530661056466 is a wasteful number, since it uses less digits than its factorization.

215530661056466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7150511785.

The product of its (nonzero) digits is 23328000, while the sum is 56.

The spelling of 215530661056466 in words is "two hundred fifteen trillion, five hundred thirty billion, six hundred sixty-one million, fifty-six thousand, four hundred sixty-six".