11279155242 has 32 divisors (see below), whose sum is σ = 23724490752. Its totient is φ = 3567929904.

The previous prime is 11279155241. The next prime is 11279155259. The reversal of 11279155242 is 24255197211.

It is a self number, because there is not a number n which added to its sum of digits gives 11279155242.

It is not an unprimeable number, because it can be changed into a prime (11279155241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 304258 + ... + 339309.

It is an arithmetic number, because the mean of its divisors is an integer number (741390336).

Almost surely, 2^11279155242 is an apocalyptic number.

11279155242 is an abundant number, since it is smaller than the sum of its proper divisors (12445335510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11279155242 is a wasteful number, since it uses less digits than its factorization.

11279155242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643722.

The product of its digits is 50400, while the sum is 39.

The spelling of 11279155242 in words is "eleven billion, two hundred seventy-nine million, one hundred fifty-five thousand, two hundred forty-two".