11391800179 has 4 divisors (see below), whose sum is σ = 11392041160. Its totient is φ = 11391559200.

The previous prime is 11391800171. The next prime is 11391800191. The reversal of 11391800179 is 97100819311.

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 11391800179 - 2³ = 11391800171 is a prime.

It is a super-2 number, since 2×11391800179² (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 (11391800171) 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, 23622 + ... + 152779.

It is an arithmetic number, because the mean of its divisors is an integer number (2848010290).

Almost surely, 2^11391800179 is an apocalyptic number.

11391800179 is a deficient number, since it is larger than the sum of its proper divisors (240981).

11391800179 is an equidigital number, since it uses as much as digits as its factorization.

11391800179 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240980.

The product of its (nonzero) digits is 13608, while the sum is 40.

The spelling of 11391800179 in words is "eleven billion, three hundred ninety-one million, eight hundred thousand, one hundred seventy-nine".