126785241677 has 2 divisors, whose sum is σ = 126785241678. Its totient is φ = 126785241676.

The previous prime is 126785241673. The next prime is 126785241691. The reversal of 126785241677 is 776142587621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115471515721 + 11313725956 = 339811^2 + 106366^2 .

It is a cyclic number.

It is not a de Polignac number, because 126785241677 - 2² = 126785241673 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126785241673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63392620838 + 63392620839.

It is an arithmetic number, because the mean of its divisors is an integer number (63392620839).

Almost surely, 2^126785241677 is an apocalyptic number.

It is an amenable number.

126785241677 is a deficient number, since it is larger than the sum of its proper divisors (1).

126785241677 is an equidigital number, since it uses as much as digits as its factorization.

126785241677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7902720, while the sum is 56.

The spelling of 126785241677 in words is "one hundred twenty-six billion, seven hundred eighty-five million, two hundred forty-one thousand, six hundred seventy-seven".