11105555538 has 32 divisors (see below), whose sum is σ = 27691776000. Its totient is φ = 2884559760.

The previous prime is 11105555509. The next prime is 11105555551. The reversal of 11105555538 is 83555550111.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11105555496 and 11105555505.

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, 12018538 + ... + 12019461.

It is an arithmetic number, because the mean of its divisors is an integer number (865368000).

Almost surely, 2^11105555538 is an apocalyptic number.

11105555538 is an abundant number, since it is smaller than the sum of its proper divisors (16586220462).

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

11105555538 is a wasteful number, since it uses less digits than its factorization.

11105555538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24038022.

The product of its (nonzero) digits is 75000, while the sum is 39.

The spelling of 11105555538 in words is "eleven billion, one hundred five million, five hundred fifty-five thousand, five hundred thirty-eight".