2164440213636 has 12 divisors (see below), whose sum is σ = 5050360498512. Its totient is φ = 721480071208.

The previous prime is 2164440213623. The next prime is 2164440213653. The reversal of 2164440213636 is 6363120444612.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90185008890 + ... + 90185008913.

It is an arithmetic number, because the mean of its divisors is an integer number (420863374876).

Almost surely, 2^{2164440213636} is an apocalyptic number.

It is an amenable number.

2164440213636 is an abundant number, since it is smaller than the sum of its proper divisors (2885920284876).

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

2164440213636 is a wasteful number, since it uses less digits than its factorization.

2164440213636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180370017810 (or 180370017808 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 42.

The spelling of 2164440213636 in words is "two trillion, one hundred sixty-four billion, four hundred forty million, two hundred thirteen thousand, six hundred thirty-six".