2164643672446 has 16 divisors (see below), whose sum is σ = 3322821942000. Its totient is φ = 1057041595008.

The previous prime is 2164643672437. The next prime is 2164643672447. The reversal of 2164643672446 is 6442763464612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2164643672447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 474481 + ... + 2134108.

It is an arithmetic number, because the mean of its divisors is an integer number (207676371375).

Almost surely, 2^{2164643672446} is an apocalyptic number.

2164643672446 is a deficient number, since it is larger than the sum of its proper divisors (1158178269554).

2164643672446 is a wasteful number, since it uses less digits than its factorization.

2164643672446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2618283.

The product of its digits is 27869184, while the sum is 55.

The spelling of 2164643672446 in words is "two trillion, one hundred sixty-four billion, six hundred forty-three million, six hundred seventy-two thousand, four hundred forty-six".