11643849556 has 12 divisors (see below), whose sum is σ = 20468113792. Its totient is φ = 5795817048.

The previous prime is 11643849541. The next prime is 11643849587. The reversal of 11643849556 is 65594834611.

It is a happy number.

It is a super-2 number, since 2×11643849556² (a number of 21 digits) contains 22 as substring.

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, 6525930 + ... + 6527713.

Almost surely, 2^11643849556 is an apocalyptic number.

It is an amenable number.

11643849556 is a deficient number, since it is larger than the sum of its proper divisors (8824264236).

11643849556 is a wasteful number, since it uses less digits than its factorization.

11643849556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13053870 (or 13053868 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 52.

The spelling of 11643849556 in words is "eleven billion, six hundred forty-three million, eight hundred forty-nine thousand, five hundred fifty-six".