11172137819 has 4 divisors (see below), whose sum is σ = 11172351240. Its totient is φ = 11171924400.

The previous prime is 11172137789. The next prime is 11172137869. The reversal of 11172137819 is 91873127111.

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 11172137819 - 2⁸ = 11172137563 is a prime.

It is a super-2 number, since 2×11172137819² (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 (11172137869) 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 3 ways as a sum of consecutive naturals, for example, 31367 + ... + 152735.

It is an arithmetic number, because the mean of its divisors is an integer number (2793087810).

Almost surely, 2^11172137819 is an apocalyptic number.

11172137819 is a deficient number, since it is larger than the sum of its proper divisors (213421).

11172137819 is an equidigital number, since it uses as much as digits as its factorization.

11172137819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213420.

The product of its digits is 21168, while the sum is 41.

The spelling of 11172137819 in words is "eleven billion, one hundred seventy-two million, one hundred thirty-seven thousand, eight hundred nineteen".