11181117534 has 16 divisors (see below), whose sum is σ = 22583644560. Its totient is φ = 3690137600.

The previous prime is 11181117529. The next prime is 11181117551. The reversal of 11181117534 is 43571118111.

It is a junction number, because it is equal to n+sod(n) for n = 11181117495 and 11181117504.

It is a congruent number.

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, 9224739 + ... + 9225950.

It is an arithmetic number, because the mean of its divisors is an integer number (1411477785).

Almost surely, 2^11181117534 is an apocalyptic number.

11181117534 is an abundant number, since it is smaller than the sum of its proper divisors (11402527026).

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

11181117534 is a wasteful number, since it uses less digits than its factorization.

11181117534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18450795.

The product of its digits is 3360, while the sum is 33.

The spelling of 11181117534 in words is "eleven billion, one hundred eighty-one million, one hundred seventeen thousand, five hundred thirty-four".