11684417961 has 4 divisors (see below), whose sum is σ = 15579223952. Its totient is φ = 7789611972.

The previous prime is 11684417947. The next prime is 11684417963. The reversal of 11684417961 is 16971448611.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-11684417961 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11684417961.

It is not an unprimeable number, because it can be changed into a prime (11684417963) 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, 1947402991 + ... + 1947402996.

It is an arithmetic number, because the mean of its divisors is an integer number (3894805988).

Almost surely, 2^11684417961 is an apocalyptic number.

It is an amenable number.

11684417961 is a deficient number, since it is larger than the sum of its proper divisors (3894805991).

11684417961 is an equidigital number, since it uses as much as digits as its factorization.

11684417961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3894805990.

The product of its digits is 290304, while the sum is 48.

The spelling of 11684417961 in words is "eleven billion, six hundred eighty-four million, four hundred seventeen thousand, nine hundred sixty-one".