16915135421187 has 36 divisors (see below), whose sum is σ = 25122718101960. Its totient is φ = 11248362353592.

The previous prime is 16915135421153. The next prime is 16915135421203. The reversal of 16915135421187 is 78112453151961.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

16915135421187 is a `hidden beast` number, since 1 + 6 + 9 + 1 + 5 + 1 + 3 + 542 + 11 + 87 = 666.

16915135421187 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16915135421187 - 2¹⁰ = 16915135420163 is a prime.

It is a super-2 number, since 2×16915135421187² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16915135421287) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 11689795698 + ... + 11689797144.

It is an arithmetic number, because the mean of its divisors is an integer number (697853280610).

Almost surely, 2^{16915135421187} is an apocalyptic number.

16915135421187 is a deficient number, since it is larger than the sum of its proper divisors (8207582680773).

16915135421187 is an frugal number, since it uses more digits than its factorization.

16915135421187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3997 (or 1997 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 54.

The spelling of 16915135421187 in words is "sixteen trillion, nine hundred fifteen billion, one hundred thirty-five million, four hundred twenty-one thousand, one hundred eighty-seven".