126691378927 has 2 divisors, whose sum is σ = 126691378928. Its totient is φ = 126691378926.

The previous prime is 126691378921. The next prime is 126691378963. The reversal of 126691378927 is 729873196621.

It is a weak prime.

It is an emirp because it is prime and its reverse (729873196621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126691378927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126691378921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63345689463 + 63345689464.

It is an arithmetic number, because the mean of its divisors is an integer number (63345689464).

Almost surely, 2^126691378927 is an apocalyptic number.

126691378927 is a deficient number, since it is larger than the sum of its proper divisors (1).

126691378927 is an equidigital number, since it uses as much as digits as its factorization.

126691378927 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13716864, while the sum is 61.

The spelling of 126691378927 in words is "one hundred twenty-six billion, six hundred ninety-one million, three hundred seventy-eight thousand, nine hundred twenty-seven".