11556555654 has 64 divisors (see below), whose sum is σ = 27207046656. Its totient is φ = 3203380224.

The previous prime is 11556555629. The next prime is 11556555667. The reversal of 11556555654 is 45655565511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 538029 + ... + 559095.

It is an arithmetic number, because the mean of its divisors is an integer number (425110104).

Almost surely, 2^11556555654 is an apocalyptic number.

11556555654 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11556555654, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13603523328).

11556555654 is an abundant number, since it is smaller than the sum of its proper divisors (15650491002).

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

11556555654 is a wasteful number, since it uses less digits than its factorization.

11556555654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21469.

The product of its digits is 2250000, while the sum is 48.

The spelling of 11556555654 in words is "eleven billion, five hundred fifty-six million, five hundred fifty-five thousand, six hundred fifty-four".