11545555555 has 16 divisors (see below), whose sum is σ = 13887813888. Its totient is φ = 9214380000.

The previous prime is 11545555543. The next prime is 11545555579. The reversal of 11545555555 is 55555554511.

It is not a de Polignac number, because 11545555555 - 2¹¹ = 11545553507 is a prime.

It is a Duffinian number.

11545555555 is a modest number, since divided by 555555 gives 11545 as remainder.

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, 5416840 + ... + 5418970.

It is an arithmetic number, because the mean of its divisors is an integer number (867988368).

Almost surely, 2^11545555555 is an apocalyptic number.

11545555555 is a deficient number, since it is larger than the sum of its proper divisors (2342258333).

11545555555 is a wasteful number, since it uses less digits than its factorization.

11545555555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4218.

The product of its digits is 1562500, while the sum is 46.

The spelling of 11545555555 in words is "eleven billion, five hundred forty-five million, five hundred fifty-five thousand, five hundred fifty-five".