16539187505 has 8 divisors (see below), whose sum is σ = 19946760000. Its totient is φ = 13164860016.

The previous prime is 16539187499. The next prime is 16539187531. The reversal of 16539187505 is 50578193561.

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 16539187505 - 2¹⁶ = 16539121969 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8310155 + ... + 8312144.

It is an arithmetic number, because the mean of its divisors is an integer number (2493345000).

Almost surely, 2^16539187505 is an apocalyptic number.

It is an amenable number.

16539187505 is a deficient number, since it is larger than the sum of its proper divisors (3407572495).

16539187505 is a wasteful number, since it uses less digits than its factorization.

16539187505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16622503.

The product of its (nonzero) digits is 1134000, while the sum is 50.

The spelling of 16539187505 in words is "sixteen billion, five hundred thirty-nine million, one hundred eighty-seven thousand, five hundred five".