126558344881 has 2 divisors, whose sum is σ = 126558344882. Its totient is φ = 126558344880.

The previous prime is 126558344867. The next prime is 126558344893. The reversal of 126558344881 is 188443855621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119843361856 + 6714983025 = 346184^2 + 81945^2 .

It is a cyclic number.

It is not a de Polignac number, because 126558344881 - 2¹³ = 126558336689 is a prime.

It is a super-2 number, since 2×126558344881² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (126558344581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63279172440 + 63279172441.

It is an arithmetic number, because the mean of its divisors is an integer number (63279172441).

Almost surely, 2^126558344881 is an apocalyptic number.

It is an amenable number.

126558344881 is a deficient number, since it is larger than the sum of its proper divisors (1).

126558344881 is an equidigital number, since it uses as much as digits as its factorization.

126558344881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7372800, while the sum is 55.

The spelling of 126558344881 in words is "one hundred twenty-six billion, five hundred fifty-eight million, three hundred forty-four thousand, eight hundred eighty-one".