16165454721044 has 12 divisors (see below), whose sum is σ = 29202111754368. Its totient is φ = 7821994219800.

The previous prime is 16165454721043. The next prime is 16165454721047. The reversal of 16165454721044 is 44012745456161.

It is a super-2 number, since 2×16165454721044² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16165454720983 and 16165454721001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16165454721043) 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, 65183285042 + ... + 65183285289.

It is an arithmetic number, because the mean of its divisors is an integer number (2433509312864).

Almost surely, 2^{16165454721044} is an apocalyptic number.

It is an amenable number.

16165454721044 is a deficient number, since it is larger than the sum of its proper divisors (13036657033324).

16165454721044 is a wasteful number, since it uses less digits than its factorization.

16165454721044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130366570366 (or 130366570364 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 50.

The spelling of 16165454721044 in words is "sixteen trillion, one hundred sixty-five billion, four hundred fifty-four million, seven hundred twenty-one thousand, forty-four".