11818899138138 has 32 divisors (see below), whose sum is σ = 24146676688896. Its totient is φ = 3855208139328.

The previous prime is 11818899138119. The next prime is 11818899138149. The reversal of 11818899138138 is 83183199881811.

It is a super-2 number, since 2×11818899138138² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48398245 + ... + 48641832.

It is an arithmetic number, because the mean of its divisors is an integer number (754583646528).

Almost surely, 2^{11818899138138} is an apocalyptic number.

11818899138138 is an abundant number, since it is smaller than the sum of its proper divisors (12327777550758).

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

11818899138138 is a wasteful number, since it uses less digits than its factorization.

11818899138138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97040518.

The product of its digits is 23887872, while the sum is 69.

The spelling of 11818899138138 in words is "eleven trillion, eight hundred eighteen billion, eight hundred ninety-nine million, one hundred thirty-eight thousand, one hundred thirty-eight".