16564116247365 has 32 divisors (see below), whose sum is σ = 26568722718720. Its totient is φ = 8812176876864.

The previous prime is 16564116247337. The next prime is 16564116247381. The reversal of 16564116247365 is 56374261146561.

It is a happy number.

It is not a de Polignac number, because 16564116247365 - 2¹³ = 16564116239173 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8935332 + ... + 10628658.

It is an arithmetic number, because the mean of its divisors is an integer number (830272584960).

Almost surely, 2^{16564116247365} is an apocalyptic number.

16564116247365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16564116247365 is a deficient number, since it is larger than the sum of its proper divisors (10004606471355).

16564116247365 is a wasteful number, since it uses less digits than its factorization.

16564116247365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1694961.

The product of its digits is 21772800, while the sum is 57.

The spelling of 16564116247365 in words is "sixteen trillion, five hundred sixty-four billion, one hundred sixteen million, two hundred forty-seven thousand, three hundred sixty-five".