2215641166505 has 32 divisors (see below), whose sum is σ = 2927362636800. Its totient is φ = 1599627958272.

The previous prime is 2215641166439. The next prime is 2215641166619. The reversal of 2215641166505 is 5056611465122.

It is a cyclic number.

It is not a de Polignac number, because 2215641166505 - 2¹⁶ = 2215641100969 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2447756 + ... + 3228434.

It is an arithmetic number, because the mean of its divisors is an integer number (91480082400).

Almost surely, 2^{2215641166505} is an apocalyptic number.

It is an amenable number.

2215641166505 is a deficient number, since it is larger than the sum of its proper divisors (711721470295).

2215641166505 is a wasteful number, since it uses less digits than its factorization.

2215641166505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781673.

The product of its (nonzero) digits is 432000, while the sum is 44.

The spelling of 2215641166505 in words is "two trillion, two hundred fifteen billion, six hundred forty-one million, one hundred sixty-six thousand, five hundred five".