11866287643 has 8 divisors (see below), whose sum is σ = 13724863488. Its totient is φ = 10048559784.

The previous prime is 11866287613. The next prime is 11866287661. The reversal of 11866287643 is 34678266811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11866287643 - 2²¹ = 11864190491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11866287613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10211371 + ... + 10212532.

It is an arithmetic number, because the mean of its divisors is an integer number (1715607936).

Almost surely, 2^11866287643 is an apocalyptic number.

11866287643 is a deficient number, since it is larger than the sum of its proper divisors (1858575845).

11866287643 is an equidigital number, since it uses as much as digits as its factorization.

11866287643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20423993.

The product of its digits is 2322432, while the sum is 52.

The spelling of 11866287643 in words is "eleven billion, eight hundred sixty-six million, two hundred eighty-seven thousand, six hundred forty-three".