11663068644 has 18 divisors (see below), whose sum is σ = 29481645830. Its totient is φ = 3887689536.

The previous prime is 11663068633. The next prime is 11663068663. The reversal of 11663068644 is 44686036611.

11663068644 is a `hidden beast` number, since 1 + 1 + 6 + 630 + 6 + 8 + 6 + 4 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11376782244 + 286286400 = 106662^2 + 16920^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 11663068644.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 161987029 + ... + 161987100.

Almost surely, 2^11663068644 is an apocalyptic number.

It is an amenable number.

11663068644 is an abundant number, since it is smaller than the sum of its proper divisors (17818577186).

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

11663068644 is a wasteful number, since it uses less digits than its factorization.

11663068644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323974139 (or 323974134 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The spelling of 11663068644 in words is "eleven billion, six hundred sixty-three million, sixty-eight thousand, six hundred forty-four".