16654749512309 has 24 divisors (see below), whose sum is σ = 17350867622088. Its totient is φ = 15985481523200.

The previous prime is 16654749512287. The next prime is 16654749512327. The reversal of 16654749512309 is 90321594745661.

It can be written as a sum of positive squares in 12 ways, for example, as 993853474084 + 15660896038225 = 996922^2 + 3957385^2 .

It is not a de Polignac number, because 16654749512309 - 2²⁴ = 16654732735093 is a prime.

It is a super-2 number, since 2×16654749512309² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16654749512369) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 201587609 + ... + 201670209.

It is an arithmetic number, because the mean of its divisors is an integer number (722952817587).

Almost surely, 2^{16654749512309} is an apocalyptic number.

It is an amenable number.

16654749512309 is a deficient number, since it is larger than the sum of its proper divisors (696118109779).

16654749512309 is a wasteful number, since it uses less digits than its factorization.

16654749512309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84073 (or 84044 counting only the distinct ones).

The product of its (nonzero) digits is 48988800, while the sum is 62.

The spelling of 16654749512309 in words is "sixteen trillion, six hundred fifty-four billion, seven hundred forty-nine million, five hundred twelve thousand, three hundred nine".