163664713723 has 16 divisors (see below), whose sum is σ = 192080885760. Its totient is φ = 136557439200.

The previous prime is 163664713721. The next prime is 163664713733. The reversal of 163664713723 is 327317466361.

It is not a de Polignac number, because 163664713723 - 2¹ = 163664713721 is a prime.

It is a super-2 number, since 2×163664713723² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163664713721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2044948 + ... + 2123473.

It is an arithmetic number, because the mean of its divisors is an integer number (12005055360).

Almost surely, 2^163664713723 is an apocalyptic number.

163664713723 is a deficient number, since it is larger than the sum of its proper divisors (28416172037).

163664713723 is an equidigital number, since it uses as much as digits as its factorization.

163664713723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4168578.

The product of its digits is 2286144, while the sum is 49.

The spelling of 163664713723 in words is "one hundred sixty-three billion, six hundred sixty-four million, seven hundred thirteen thousand, seven hundred twenty-three".