16491195133 has 16 divisors (see below), whose sum is σ = 19067529600. Its totient is φ = 13970589696.

The previous prime is 16491195131. The next prime is 16491195157. The reversal of 16491195133 is 33159119461.

It is not a de Polignac number, because 16491195133 - 2¹ = 16491195131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16491195133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16491195131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 298893 + ... + 349741.

It is an arithmetic number, because the mean of its divisors is an integer number (1191720600).

Almost surely, 2^16491195133 is an apocalyptic number.

It is an amenable number.

16491195133 is a deficient number, since it is larger than the sum of its proper divisors (2576334467).

16491195133 is a wasteful number, since it uses less digits than its factorization.

16491195133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51396.

The product of its digits is 87480, while the sum is 43.

The spelling of 16491195133 in words is "sixteen billion, four hundred ninety-one million, one hundred ninety-five thousand, one hundred thirty-three".