16266408191 has 4 divisors (see below), whose sum is σ = 17745172584. Its totient is φ = 14787643800.

The previous prime is 16266408173. The next prime is 16266408199. The reversal of 16266408191 is 19180466261.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16266408191 - 2⁶ = 16266408127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16266408199) 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, 739382180 + ... + 739382201.

It is an arithmetic number, because the mean of its divisors is an integer number (4436293146).

Almost surely, 2^16266408191 is an apocalyptic number.

16266408191 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16266408191 is a deficient number, since it is larger than the sum of its proper divisors (1478764393).

16266408191 is a wasteful number, since it uses less digits than its factorization.

16266408191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1478764392.

The product of its (nonzero) digits is 124416, while the sum is 44.

The spelling of 16266408191 in words is "sixteen billion, two hundred sixty-six million, four hundred eight thousand, one hundred ninety-one".