16539951264909 has 4 divisors (see below), whose sum is σ = 22053268353216. Its totient is φ = 11026634176604.

The previous prime is 16539951264887. The next prime is 16539951264913. The reversal of 16539951264909 is 90946215993561.

16539951264909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16539951264909 - 2¹⁷ = 16539951133837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16539951264959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2756658544149 + ... + 2756658544154.

It is an arithmetic number, because the mean of its divisors is an integer number (5513317088304).

Almost surely, 2^{16539951264909} is an apocalyptic number.

It is an amenable number.

16539951264909 is a deficient number, since it is larger than the sum of its proper divisors (5513317088307).

16539951264909 is an equidigital number, since it uses as much as digits as its factorization.

16539951264909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5513317088306.

The product of its (nonzero) digits is 141717600, while the sum is 69.

The spelling of 16539951264909 in words is "sixteen trillion, five hundred thirty-nine billion, nine hundred fifty-one million, two hundred sixty-four thousand, nine hundred nine".