16192911861 has 72 divisors (see below), whose sum is σ = 28867937280. Its totient is φ = 8696491776.

The previous prime is 16192911857. The next prime is 16192911863. The reversal of 16192911861 is 16811929161.

16192911861 is a `hidden beast` number, since 1 + 619 + 29 + 1 + 1 + 8 + 6 + 1 = 666.

It is not a de Polignac number, because 16192911861 - 2² = 16192911857 is a prime.

It is a super-2 number, since 2×16192911861² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16192911863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1056525 + ... + 1071741.

Almost surely, 2^16192911861 is an apocalyptic number.

It is an amenable number.

16192911861 is a deficient number, since it is larger than the sum of its proper divisors (12675025419).

16192911861 is a wasteful number, since it uses less digits than its factorization.

16192911861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15383 (or 15373 counting only the distinct ones).

The product of its digits is 46656, while the sum is 45.

The spelling of 16192911861 in words is "sixteen billion, one hundred ninety-two million, nine hundred eleven thousand, eight hundred sixty-one".