126858859861 has 2 divisors, whose sum is σ = 126858859862. Its totient is φ = 126858859860.

The previous prime is 126858859753. The next prime is 126858859867. The reversal of 126858859861 is 168958858621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113354095761 + 13504764100 = 336681^2 + 116210^2 .

It is a cyclic number.

It is not a de Polignac number, because 126858859861 - 2⁷ = 126858859733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126858859867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63429429930 + 63429429931.

It is an arithmetic number, because the mean of its divisors is an integer number (63429429931).

Almost surely, 2^126858859861 is an apocalyptic number.

It is an amenable number.

126858859861 is a deficient number, since it is larger than the sum of its proper divisors (1).

126858859861 is an equidigital number, since it uses as much as digits as its factorization.

126858859861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 66355200, while the sum is 67.

The spelling of 126858859861 in words is "one hundred twenty-six billion, eight hundred fifty-eight million, eight hundred fifty-nine thousand, eight hundred sixty-one".