126391565719439 has 2 divisors, whose sum is σ = 126391565719440. Its totient is φ = 126391565719438.

The previous prime is 126391565719429. The next prime is 126391565719499. The reversal of 126391565719439 is 934917565193621.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126391565719439 is a prime.

It is a super-2 number, since 2×126391565719439² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126391565719429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63195782859719 + 63195782859720.

It is an arithmetic number, because the mean of its divisors is an integer number (63195782859720).

Almost surely, 2^{126391565719439} is an apocalyptic number.

126391565719439 is a deficient number, since it is larger than the sum of its proper divisors (1).

126391565719439 is an equidigital number, since it uses as much as digits as its factorization.

126391565719439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 330674400, while the sum is 71.

The spelling of 126391565719439 in words is "one hundred twenty-six trillion, three hundred ninety-one billion, five hundred sixty-five million, seven hundred nineteen thousand, four hundred thirty-nine".