11506665552 has 40 divisors (see below), whose sum is σ = 30144231360. Its totient is φ = 3781532160.

The previous prime is 11506665523. The next prime is 11506665637. The reversal of 11506665552 is 25556660511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1684777 + ... + 1691592.

It is an arithmetic number, because the mean of its divisors is an integer number (753605784).

Almost surely, 2^11506665552 is an apocalyptic number.

11506665552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11506665552 is an abundant number, since it is smaller than the sum of its proper divisors (18637565808).

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

11506665552 is a wasteful number, since it uses less digits than its factorization.

11506665552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3376451 (or 3376445 counting only the distinct ones).

The product of its (nonzero) digits is 270000, while the sum is 42.

The spelling of 11506665552 in words is "eleven billion, five hundred six million, six hundred sixty-five thousand, five hundred fifty-two".