165704563444723 has 4 divisors (see below), whose sum is σ = 165704594819920. Its totient is φ = 165704532069528.

The previous prime is 165704563444697. The next prime is 165704563444729. The reversal of 165704563444723 is 327444365407561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165704563444723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165704563444729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5605788 + ... + 19048201.

It is an arithmetic number, because the mean of its divisors is an integer number (41426148704980).

Almost surely, 2^{165704563444723} is an apocalyptic number.

165704563444723 is a deficient number, since it is larger than the sum of its proper divisors (31375197).

165704563444723 is an equidigital number, since it uses as much as digits as its factorization.

165704563444723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31375196.

The product of its (nonzero) digits is 203212800, while the sum is 61.

The spelling of 165704563444723 in words is "one hundred sixty-five trillion, seven hundred four billion, five hundred sixty-three million, four hundred forty-four thousand, seven hundred twenty-three".