11681932417 has 4 divisors (see below), whose sum is σ = 11732069700. Its totient is φ = 11631795136.

The previous prime is 11681932387. The next prime is 11681932447. The reversal of 11681932417 is 71423918611.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71423918611 = 101 ⋅707167511.

It is an interprime number because it is at equal distance from previous prime (11681932387) and next prime (11681932447).

It can be written as a sum of positive squares in 2 ways, for example, as 5044408576 + 6637523841 = 71024^2 + 81471^2 .

It is a cyclic number.

It is not a de Polignac number, because 11681932417 - 2⁷ = 11681932289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11681932447) 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, 25068292 + ... + 25068757.

It is an arithmetic number, because the mean of its divisors is an integer number (2933017425).

Almost surely, 2^11681932417 is an apocalyptic number.

It is an amenable number.

11681932417 is a deficient number, since it is larger than the sum of its proper divisors (50137283).

11681932417 is an equidigital number, since it uses as much as digits as its factorization.

11681932417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50137282.

The product of its digits is 72576, while the sum is 43.

The spelling of 11681932417 in words is "eleven billion, six hundred eighty-one million, nine hundred thirty-two thousand, four hundred seventeen".