11115561006 has 96 divisors (see below), whose sum is σ = 26900729856. Its totient is φ = 3288264000.

The previous prime is 11115560977. The next prime is 11115561031. The reversal of 11115561006 is 60016551111.

11115561006 is a `hidden beast` number, since 1 + 1 + 1 + 1 + 556 + 100 + 6 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4288771 + ... + 4291361.

It is an arithmetic number, because the mean of its divisors is an integer number (280215936).

Almost surely, 2^11115561006 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11115561006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13450364928).

11115561006 is an abundant number, since it is smaller than the sum of its proper divisors (15785168850).

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

11115561006 is a wasteful number, since it uses less digits than its factorization.

11115561006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3118 (or 3115 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 27.

The spelling of 11115561006 in words is "eleven billion, one hundred fifteen million, five hundred sixty-one thousand, six".