11705663644 has 12 divisors (see below), whose sum is σ = 20488552000. Its totient is φ = 5851791648.

The previous prime is 11705663639. The next prime is 11705663653. The reversal of 11705663644 is 44636650711.

It is a super-2 number, since 2×11705663644² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11705663644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234444 + ... + 279955.

Almost surely, 2^11705663644 is an apocalyptic number.

It is an amenable number.

11705663644 is a deficient number, since it is larger than the sum of its proper divisors (8782888356).

11705663644 is a wasteful number, since it uses less digits than its factorization.

11705663644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520092 (or 520090 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 11705663644 in words is "eleven billion, seven hundred five million, six hundred sixty-three thousand, six hundred forty-four".