11621166443 has 4 divisors (see below), whose sum is σ = 11664049248. Its totient is φ = 11578283640.

The previous prime is 11621166439. The next prime is 11621166451. The reversal of 11621166443 is 34466112611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34466112611 = 7 ⋅4923730373.

It is a cyclic number.

It is not a de Polignac number, because 11621166443 - 2² = 11621166439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11621166413) 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, 21440996 + ... + 21441537.

It is an arithmetic number, because the mean of its divisors is an integer number (2916012312).

Almost surely, 2^11621166443 is an apocalyptic number.

11621166443 is a deficient number, since it is larger than the sum of its proper divisors (42882805).

11621166443 is an equidigital number, since it uses as much as digits as its factorization.

11621166443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42882804.

The product of its digits is 20736, while the sum is 35.

The spelling of 11621166443 in words is "eleven billion, six hundred twenty-one million, one hundred sixty-six thousand, four hundred forty-three".