10691111809 has 8 divisors (see below), whose sum is σ = 12293374400. Its totient is φ = 9107589456.

The previous prime is 10691111803. The next prime is 10691111813. The reversal of 10691111809 is 90811119601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10691111809 - 2⁵ = 10691111777 is a prime.

It is a super-2 number, since 2×10691111809² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10691111803) 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 7 ways as a sum of consecutive naturals, for example, 4683834 + ... + 4686115.

It is an arithmetic number, because the mean of its divisors is an integer number (1536671800).

Almost surely, 2^10691111809 is an apocalyptic number.

It is an amenable number.

10691111809 is a deficient number, since it is larger than the sum of its proper divisors (1602262591).

10691111809 is an equidigital number, since it uses as much as digits as its factorization.

10691111809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9370119.

The product of its (nonzero) digits is 3888, while the sum is 37.

It can be divided in two parts, 10691 and 111809, that added together give a square (122500 = 350²).

The spelling of 10691111809 in words is "ten billion, six hundred ninety-one million, one hundred eleven thousand, eight hundred nine".