10891636556 has 24 divisors (see below), whose sum is σ = 19475924160. Its totient is φ = 5327206272.

The previous prime is 10891636549. The next prime is 10891636579. The reversal of 10891636556 is 65563619801.

It is a super-2 number, since 2×10891636556² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 378866 + ... + 406598.

It is an arithmetic number, because the mean of its divisors is an integer number (811496840).

Almost surely, 2^10891636556 is an apocalyptic number.

It is an amenable number.

10891636556 is a deficient number, since it is larger than the sum of its proper divisors (8584287604).

10891636556 is a wasteful number, since it uses less digits than its factorization.

10891636556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29873 (or 29871 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 50.

The spelling of 10891636556 in words is "ten billion, eight hundred ninety-one million, six hundred thirty-six thousand, five hundred fifty-six".