11009947856888 has 32 divisors (see below), whose sum is σ = 20653089501600. Its totient is φ = 5502457734528.

The previous prime is 11009947856881. The next prime is 11009947856923. The reversal of 11009947856888 is 88865874990011.

It is a super-2 number, since 2×11009947856888² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11009947856881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321788870 + ... + 321823082.

It is an arithmetic number, because the mean of its divisors is an integer number (645409046925).

Almost surely, 2^{11009947856888} is an apocalyptic number.

It is an amenable number.

11009947856888 is a deficient number, since it is larger than the sum of its proper divisors (9643141644712).

11009947856888 is a wasteful number, since it uses less digits than its factorization.

11009947856888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51431 (or 51427 counting only the distinct ones).

The product of its (nonzero) digits is 278691840, while the sum is 74.

The spelling of 11009947856888 in words is "eleven trillion, nine billion, nine hundred forty-seven million, eight hundred fifty-six thousand, eight hundred eighty-eight".