126740709391 has 2 divisors, whose sum is σ = 126740709392. Its totient is φ = 126740709390.

The previous prime is 126740709317. The next prime is 126740709397. The reversal of 126740709391 is 193907047621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 126740709391 - 2¹⁷ = 126740578319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126740709397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63370354695 + 63370354696.

It is an arithmetic number, because the mean of its divisors is an integer number (63370354696).

Almost surely, 2^126740709391 is an apocalyptic number.

126740709391 is a deficient number, since it is larger than the sum of its proper divisors (1).

126740709391 is an equidigital number, since it uses as much as digits as its factorization.

126740709391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 571536, while the sum is 49.

The spelling of 126740709391 in words is "one hundred twenty-six billion, seven hundred forty million, seven hundred nine thousand, three hundred ninety-one".