16107209991 has 8 divisors (see below), whose sum is σ = 23862533360. Its totient is φ = 10738139976.

The previous prime is 16107209983. The next prime is 16107209999. The reversal of 16107209991 is 19990270161.

16107209991 is a `hidden beast` number, since 1 + 610 + 7 + 20 + 9 + 9 + 9 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (16107209983) and next prime (16107209999).

It is not a de Polignac number, because 16107209991 - 2³ = 16107209983 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 (16107209999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 298281640 + ... + 298281693.

It is an arithmetic number, because the mean of its divisors is an integer number (2982816670).

Almost surely, 2^16107209991 is an apocalyptic number.

16107209991 is a deficient number, since it is larger than the sum of its proper divisors (7755323369).

16107209991 is an equidigital number, since it uses as much as digits as its factorization.

16107209991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596563342 (or 596563336 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 45.

The spelling of 16107209991 in words is "sixteen billion, one hundred seven million, two hundred nine thousand, nine hundred ninety-one".