11662181279 has 4 divisors (see below), whose sum is σ = 13328207184. Its totient is φ = 9996155376.

The previous prime is 11662181233. The next prime is 11662181287. The reversal of 11662181279 is 97218126611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11662181279 - 2¹² = 11662177183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11662187279) 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, 833012942 + ... + 833012955.

It is an arithmetic number, because the mean of its divisors is an integer number (3332051796).

Almost surely, 2^11662181279 is an apocalyptic number.

11662181279 is a deficient number, since it is larger than the sum of its proper divisors (1666025905).

11662181279 is an equidigital number, since it uses as much as digits as its factorization.

11662181279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666025904.

The product of its digits is 72576, while the sum is 44.

The spelling of 11662181279 in words is "eleven billion, six hundred sixty-two million, one hundred eighty-one thousand, two hundred seventy-nine".