16564112406265 has 8 divisors (see below), whose sum is σ = 19877972583240. Its totient is φ = 13250598127872.

The previous prime is 16564112406161. The next prime is 16564112406269. The reversal of 16564112406265 is 56260421146561.

It can be written as a sum of positive squares in 4 ways, for example, as 623872500736 + 15940239905529 = 789856^2 + 3992523^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16564112406265 - 2¹³ = 16564112398073 is a prime.

It is a super-2 number, since 2×16564112406265² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16564112406269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86369280 + ... + 86560849.

It is an arithmetic number, because the mean of its divisors is an integer number (2484746572905).

Almost surely, 2^{16564112406265} is an apocalyptic number.

It is an amenable number.

16564112406265 is a deficient number, since it is larger than the sum of its proper divisors (3313860176975).

16564112406265 is a wasteful number, since it uses less digits than its factorization.

16564112406265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172949291.

The product of its (nonzero) digits is 2073600, while the sum is 49.

The spelling of 16564112406265 in words is "sixteen trillion, five hundred sixty-four billion, one hundred twelve million, four hundred six thousand, two hundred sixty-five".