11655551560 has 32 divisors (see below), whose sum is σ = 27767639160. Its totient is φ = 4387972096.

The previous prime is 11655551519. The next prime is 11655551561. The reversal of 11655551560 is 6515555611.

11655551560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 6724984036 + 4930567524 = 82006^2 + 70218^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (11655551561) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 8569579 + ... + 8570938.

Almost surely, 2^11655551560 is an apocalyptic number.

11655551560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11655551560 is an abundant number, since it is smaller than the sum of its proper divisors (16112087600).

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

11655551560 is a wasteful number, since it uses less digits than its factorization.

11655551560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17140545 (or 17140541 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 40.

The spelling of 11655551560 in words is "eleven billion, six hundred fifty-five million, five hundred fifty-one thousand, five hundred sixty".