2164406644026 has 32 divisors (see below), whose sum is σ = 5247046411200. Its totient is φ = 655880801040.

The previous prime is 2164406643979. The next prime is 2164406644033. The reversal of 2164406644026 is 6204466044612.

2164406644026 is a `hidden beast` number, since 2 + 164 + 40 + 6 + 6 + 440 + 2 + 6 = 666.

It is a super-2 number, since 2×2164406644026² (a number of 25 digits) contains 22 as substring.

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, 1821890521 + ... + 1821891708.

It is an arithmetic number, because the mean of its divisors is an integer number (163970200350).

Almost surely, 2^{2164406644026} is an apocalyptic number.

2164406644026 is an abundant number, since it is smaller than the sum of its proper divisors (3082639767174).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2164406644026 is a wasteful number, since it uses less digits than its factorization.

2164406644026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3643782251 (or 3643782245 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 45.

The spelling of 2164406644026 in words is "two trillion, one hundred sixty-four billion, four hundred six million, six hundred forty-four thousand, twenty-six".