11505645605 has 16 divisors (see below), whose sum is σ = 14540964480. Its totient is φ = 8715557952.

The previous prime is 11505645539. The next prime is 11505645653. The reversal of 11505645605 is 50654650511.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11505645605 - 2¹⁰ = 11505644581 is a prime.

It is a Curzon number.

It is a congruent number.

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, 159392 + ... + 220038.

It is an arithmetic number, because the mean of its divisors is an integer number (908810280).

Almost surely, 2^11505645605 is an apocalyptic number.

It is an amenable number.

11505645605 is a deficient number, since it is larger than the sum of its proper divisors (3035318875).

11505645605 is a wasteful number, since it uses less digits than its factorization.

11505645605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62668.

The product of its (nonzero) digits is 90000, while the sum is 38.

The spelling of 11505645605 in words is "eleven billion, five hundred five million, six hundred forty-five thousand, six hundred five".