11970371911691 has 2 divisors, whose sum is σ = 11970371911692. Its totient is φ = 11970371911690.

The previous prime is 11970371911661. The next prime is 11970371911703. The reversal of 11970371911691 is 19611917307911.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11970371911691 - 2⁶ = 11970371911627 is a prime.

It is not a weakly prime, because it can be changed into another prime (11970371911661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5985185955845 + 5985185955846.

It is an arithmetic number, because the mean of its divisors is an integer number (5985185955846).

Almost surely, 2^{11970371911691} is an apocalyptic number.

11970371911691 is a deficient number, since it is larger than the sum of its proper divisors (1).

11970371911691 is an equidigital number, since it uses as much as digits as its factorization.

11970371911691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 642978, while the sum is 56.

The spelling of 11970371911691 in words is "eleven trillion, nine hundred seventy billion, three hundred seventy-one million, nine hundred eleven thousand, six hundred ninety-one".