11668564642 has 64 divisors (see below), whose sum is σ = 21080113920. Its totient is φ = 4738922496.

The previous prime is 11668564637. The next prime is 11668564717. The reversal of 11668564642 is 24646586611.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4907758 + ... + 4910134.

It is an arithmetic number, because the mean of its divisors is an integer number (329376780).

Almost surely, 2^11668564642 is an apocalyptic number.

11668564642 is a deficient number, since it is larger than the sum of its proper divisors (9411549278).

11668564642 is a wasteful number, since it uses less digits than its factorization.

11668564642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2635.

The product of its digits is 1658880, while the sum is 49.

The spelling of 11668564642 in words is "eleven billion, six hundred sixty-eight million, five hundred sixty-four thousand, six hundred forty-two".