11279518391 has 8 divisors (see below), whose sum is σ = 11561108160. Its totient is φ = 10999662048.

The previous prime is 11279518381. The next prime is 11279518417. The reversal of 11279518391 is 19381597211.

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

It is a cyclic number.

It is not a de Polignac number, because 11279518391 - 2¹⁰ = 11279517367 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11279518331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 420176 + ... + 446213.

It is an arithmetic number, because the mean of its divisors is an integer number (1445138520).

Almost surely, 2^11279518391 is an apocalyptic number.

11279518391 is a deficient number, since it is larger than the sum of its proper divisors (281589769).

11279518391 is an equidigital number, since it uses as much as digits as its factorization.

11279518391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866713.

The product of its digits is 136080, while the sum is 47.

The spelling of 11279518391 in words is "eleven billion, two hundred seventy-nine million, five hundred eighteen thousand, three hundred ninety-one".