16564272220725 has 12 divisors (see below), whose sum is σ = 27386263405056. Its totient is φ = 8834278517680.

The previous prime is 16564272220687. The next prime is 16564272220777. The reversal of 16564272220725 is 52702227246561.

It is not a de Polignac number, because 16564272220725 - 2¹⁴ = 16564272204341 is a prime.

It is a super-2 number, since 2×16564272220725² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110428481397 + ... + 110428481546.

It is an arithmetic number, because the mean of its divisors is an integer number (2282188617088).

Almost surely, 2^{16564272220725} is an apocalyptic number.

16564272220725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16564272220725 is a deficient number, since it is larger than the sum of its proper divisors (10821991184331).

16564272220725 is a wasteful number, since it uses less digits than its factorization.

16564272220725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220856962956 (or 220856962951 counting only the distinct ones).

The product of its (nonzero) digits is 5644800, while the sum is 51.

The spelling of 16564272220725 in words is "sixteen trillion, five hundred sixty-four billion, two hundred seventy-two million, two hundred twenty thousand, seven hundred twenty-five".