11655880560 has 100 divisors (see below), whose sum is σ = 40482622488. Its totient is φ = 3108233088.

The previous prime is 11655880547. The next prime is 11655880571. The reversal of 11655880560 is 6508855611.

11655880560 is a `hidden beast` number, since 1 + 1 + 6 + 5 + 5 + 8 + 80 + 560 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 892894 + ... + 905853.

Almost surely, 2^11655880560 is an apocalyptic number.

11655880560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11655880560 is an abundant number, since it is smaller than the sum of its proper divisors (28826741928).

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

11655880560 is a wasteful number, since it uses less digits than its factorization.

11655880560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1798772 (or 1798757 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 45.

The spelling of 11655880560 in words is "eleven billion, six hundred fifty-five million, eight hundred eighty thousand, five hundred sixty".