11615566020 has 96 divisors (see below), whose sum is σ = 34389626880. Its totient is φ = 2921235840.

The previous prime is 11615566009. The next prime is 11615566037. The reversal of 11615566020 is 2066551611.

11615566020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 231375 + ... + 277065.

It is an arithmetic number, because the mean of its divisors is an integer number (358225280).

Almost surely, 2^11615566020 is an apocalyptic number.

11615566020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11615566020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17194813440).

11615566020 is an abundant number, since it is smaller than the sum of its proper divisors (22774060860).

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

11615566020 is a wasteful number, since it uses less digits than its factorization.

11615566020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45945 (or 45943 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 33.

The spelling of 11615566020 in words is "eleven billion, six hundred fifteen million, five hundred sixty-six thousand, twenty".