165623442412664 has 32 divisors (see below), whose sum is σ = 312494320368720. Its totient is φ = 82291770602496.

The previous prime is 165623442412639. The next prime is 165623442412669. The reversal of 165623442412664 is 466214244326561.

It is a super-2 number, since 2×165623442412664² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165623442412669) 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 7 ways as a sum of consecutive naturals, for example, 161369 + ... + 18200904.

Almost surely, 2^{165623442412664} is an apocalyptic number.

It is an amenable number.

165623442412664 is a deficient number, since it is larger than the sum of its proper divisors (146870877956056).

165623442412664 is a wasteful number, since it uses less digits than its factorization.

165623442412664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18369359 (or 18369355 counting only the distinct ones).

The product of its digits is 39813120, while the sum is 56.

The spelling of 165623442412664 in words is "one hundred sixty-five trillion, six hundred twenty-three billion, four hundred forty-two million, four hundred twelve thousand, six hundred sixty-four".