11855117418 has 16 divisors (see below), whose sum is σ = 23713754400. Its totient is φ = 3951119216.

The previous prime is 11855117411. The next prime is 11855117419. The reversal of 11855117418 is 81471155811.

It is a self number, because there is not a number n which added to its sum of digits gives 11855117418.

It is not an unprimeable number, because it can be changed into a prime (11855117411) 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, 101805 + ... + 184592.

It is an arithmetic number, because the mean of its divisors is an integer number (1482109650).

Almost surely, 2^11855117418 is an apocalyptic number.

11855117418 is an abundant number, since it is smaller than the sum of its proper divisors (11858636982).

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

11855117418 is a wasteful number, since it uses less digits than its factorization.

11855117418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293301.

The product of its digits is 44800, while the sum is 42.

The spelling of 11855117418 in words is "eleven billion, eight hundred fifty-five million, one hundred seventeen thousand, four hundred eighteen".