164240216645643 has 24 divisors (see below), whose sum is σ = 237292346463120. Its totient is φ = 109467413563200.

The previous prime is 164240216645611. The next prime is 164240216645711. The reversal of 164240216645643 is 346546612042461.

164240216645643 is a `hidden beast` number, since 1 + 6 + 4 + 2 + 4 + 0 + 2 + 16 + 64 + 564 + 3 = 666.

It is not a de Polignac number, because 164240216645643 - 2⁵ = 164240216645611 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 164240216645643.

It is not an unprimeable number, because it can be changed into a prime (164240216641643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 860571553 + ... + 860762381.

It is an arithmetic number, because the mean of its divisors is an integer number (9887181102630).

Almost surely, 2^{164240216645643} is an apocalyptic number.

164240216645643 is a deficient number, since it is larger than the sum of its proper divisors (73052129817477).

164240216645643 is a wasteful number, since it uses less digits than its factorization.

164240216645643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213099 (or 213096 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 54.

The spelling of 164240216645643 in words is "one hundred sixty-four trillion, two hundred forty billion, two hundred sixteen million, six hundred forty-five thousand, six hundred forty-three".