11665111552 has 40 divisors (see below), whose sum is σ = 23849518176. Its totient is φ = 5696904192.

The previous prime is 11665111547. The next prime is 11665111553. The reversal of 11665111552 is 25511156611.

It is not an unprimeable number, because it can be changed into a prime (11665111553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242908 + ... + 286939.

Almost surely, 2^11665111552 is an apocalyptic number.

It is an amenable number.

11665111552 is an abundant number, since it is smaller than the sum of its proper divisors (12184406624).

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

11665111552 is an frugal number, since it uses more digits than its factorization.

11665111552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529908 (or 529892 counting only the distinct ones).

The product of its digits is 9000, while the sum is 34.

The spelling of 11665111552 in words is "eleven billion, six hundred sixty-five million, one hundred eleven thousand, five hundred fifty-two".