11554887791818 has 16 divisors (see below), whose sum is σ = 19872071616384. Its totient is φ = 4936171631760.

The previous prime is 11554887791801. The next prime is 11554887791857. The reversal of 11554887791818 is 81819778845511.

11554887791818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11554887791818² (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 7 ways as a sum of consecutive naturals, for example, 1326923505 + ... + 1326932212.

It is an arithmetic number, because the mean of its divisors is an integer number (1242004476024).

Almost surely, 2^{11554887791818} is an apocalyptic number.

11554887791818 is a deficient number, since it is larger than the sum of its proper divisors (8317183824566).

11554887791818 is a wasteful number, since it uses less digits than its factorization.

11554887791818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2653856037.

The product of its digits is 180633600, while the sum is 73.

The spelling of 11554887791818 in words is "eleven trillion, five hundred fifty-four billion, eight hundred eighty-seven million, seven hundred ninety-one thousand, eight hundred eighteen".