164416334116621 has 16 divisors (see below), whose sum is σ = 164962166457600. Its totient is φ = 163871442379008.

The previous prime is 164416334116607. The next prime is 164416334116627. The reversal of 164416334116621 is 126611433614461.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 164416334116621 - 2¹⁷ = 164416333985549 is a prime.

It is a super-3 number, since 3×164416334116621³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164416334116627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7586217841 + ... + 7586239513.

It is an arithmetic number, because the mean of its divisors is an integer number (10310135403600).

Almost surely, 2^{164416334116621} is an apocalyptic number.

It is an amenable number.

164416334116621 is a deficient number, since it is larger than the sum of its proper divisors (545832340979).

164416334116621 is a wasteful number, since it uses less digits than its factorization.

164416334116621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42228.

The product of its digits is 1492992, while the sum is 49.

The spelling of 164416334116621 in words is "one hundred sixty-four trillion, four hundred sixteen billion, three hundred thirty-four million, one hundred sixteen thousand, six hundred twenty-one".