11930664961 has 4 divisors (see below), whose sum is σ = 11933746132. Its totient is φ = 11927583792.

The previous prime is 11930664917. The next prime is 11930664979. The reversal of 11930664961 is 16946603911.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5150789361 + 6779875600 = 71769^2 + 82340^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11930664961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11930664901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1534770 + ... + 1542523.

It is an arithmetic number, because the mean of its divisors is an integer number (2983436533).

Almost surely, 2^11930664961 is an apocalyptic number.

It is an amenable number.

11930664961 is a deficient number, since it is larger than the sum of its proper divisors (3081171).

11930664961 is an equidigital number, since it uses as much as digits as its factorization.

11930664961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3081170.

The product of its (nonzero) digits is 209952, while the sum is 46.

The spelling of 11930664961 in words is "eleven billion, nine hundred thirty million, six hundred sixty-four thousand, nine hundred sixty-one".