11191566252 has 18 divisors (see below), whose sum is σ = 26114509708. Its totient is φ = 3730399928.

The previous prime is 11191566247. The next prime is 11191566299. The reversal of 11191566252 is 25266519111.

It is a self number, because there is not a number n which added to its sum of digits gives 11191566252.

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 5 ways as a sum of consecutive naturals, for example, 351199 + ... + 381737.

Almost surely, 2^11191566252 is an apocalyptic number.

11191566252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11191566252 is an abundant number, since it is smaller than the sum of its proper divisors (14922943456).

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

11191566252 is an frugal number, since it uses more digits than its factorization.

11191566252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61085 (or 30544 counting only the distinct ones).

The product of its digits is 32400, while the sum is 39.

The spelling of 11191566252 in words is "eleven billion, one hundred ninety-one million, five hundred sixty-six thousand, two hundred fifty-two".