13125440430491 has 2 divisors, whose sum is σ = 13125440430492. Its totient is φ = 13125440430490.

The previous prime is 13125440430463. The next prime is 13125440430511. The reversal of 13125440430491 is 19403404452131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13125440430491 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (13125440430461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6562720215245 + 6562720215246.

It is an arithmetic number, because the mean of its divisors is an integer number (6562720215246).

Almost surely, 2^{13125440430491} is an apocalyptic number.

13125440430491 is a deficient number, since it is larger than the sum of its proper divisors (1).

13125440430491 is an equidigital number, since it uses as much as digits as its factorization.

13125440430491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 13125440430491 in words is "thirteen trillion, one hundred twenty-five billion, four hundred forty million, four hundred thirty thousand, four hundred ninety-one".