11655656660 has 12 divisors (see below), whose sum is σ = 24476879028. Its totient is φ = 4662262656.

The previous prime is 11655656657. The next prime is 11655656687. The reversal of 11655656660 is 6665655611.

It can be written as a sum of positive squares in 2 ways, for example, as 7843582096 + 3812074564 = 88564^2 + 61742^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 291391397 + ... + 291391436.

It is an arithmetic number, because the mean of its divisors is an integer number (2039739919).

Almost surely, 2^11655656660 is an apocalyptic number.

11655656660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11655656660 is an abundant number, since it is smaller than the sum of its proper divisors (12821222368).

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

11655656660 is a wasteful number, since it uses less digits than its factorization.

11655656660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582782842 (or 582782840 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 47.

The spelling of 11655656660 in words is "eleven billion, six hundred fifty-five million, six hundred fifty-six thousand, six hundred sixty".