16564771451322 has 192 divisors, whose sum is σ = 39749616466560. Its totient is φ = 4964003315712.

The previous prime is 16564771451321. The next prime is 16564771451341. The reversal of 16564771451322 is 22315417746561.

16564771451322 is a `hidden beast` number, since 1 + 6 + 5 + 6 + 477 + 145 + 1 + 3 + 22 = 666.

It is not an unprimeable number, because it can be changed into a prime (16564771451321) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 149774868 + ... + 149885424.

It is an arithmetic number, because the mean of its divisors is an integer number (207029252430).

Almost surely, 2^{16564771451322} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16564771451322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19874808233280).

16564771451322 is an abundant number, since it is smaller than the sum of its proper divisors (23184845015238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16564771451322 is a wasteful number, since it uses less digits than its factorization.

16564771451322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110877 (or 110874 counting only the distinct ones).

The product of its digits is 8467200, while the sum is 54.

The spelling of 16564771451322 in words is "sixteen trillion, five hundred sixty-four billion, seven hundred seventy-one million, four hundred fifty-one thousand, three hundred twenty-two".