11091171851 has 2 divisors, whose sum is σ = 11091171852. Its totient is φ = 11091171850.

The previous prime is 11091171809. The next prime is 11091171869. The reversal of 11091171851 is 15817119011.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11091171851 - 2⁶ = 11091171787 is a prime.

It is not a weakly prime, because it can be changed into another prime (11091170851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5545585925 + 5545585926.

It is an arithmetic number, because the mean of its divisors is an integer number (5545585926).

Almost surely, 2^11091171851 is an apocalyptic number.

11091171851 is a deficient number, since it is larger than the sum of its proper divisors (1).

11091171851 is an equidigital number, since it uses as much as digits as its factorization.

11091171851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 35.

The spelling of 11091171851 in words is "eleven billion, ninety-one million, one hundred seventy-one thousand, eight hundred fifty-one".