126375727591 has 2 divisors, whose sum is σ = 126375727592. Its totient is φ = 126375727590.

The previous prime is 126375727589. The next prime is 126375727607. The reversal of 126375727591 is 195727573621.

It is a weak prime.

It is an emirp because it is prime and its reverse (195727573621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126375727591 - 2¹ = 126375727589 is a prime.

Together with 126375727589, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126375727571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63187863795 + 63187863796.

It is an arithmetic number, because the mean of its divisors is an integer number (63187863796).

Almost surely, 2^126375727591 is an apocalyptic number.

126375727591 is a deficient number, since it is larger than the sum of its proper divisors (1).

126375727591 is an equidigital number, since it uses as much as digits as its factorization.

126375727591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5556600, while the sum is 55.

The spelling of 126375727591 in words is "one hundred twenty-six billion, three hundred seventy-five million, seven hundred twenty-seven thousand, five hundred ninety-one".