126556434302873 has 2 divisors, whose sum is σ = 126556434302874. Its totient is φ = 126556434302872.

The previous prime is 126556434302861. The next prime is 126556434302891. The reversal of 126556434302873 is 378203434655621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91271788855129 + 35284645447744 = 9553627^2 + 5940088^2 .

It is a cyclic number.

It is not a de Polignac number, because 126556434302873 - 2²² = 126556430108569 is a prime.

It is a super-2 number, since 2×126556434302873² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (126556434302813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63278217151436 + 63278217151437.

It is an arithmetic number, because the mean of its divisors is an integer number (63278217151437).

Almost surely, 2^{126556434302873} is an apocalyptic number.

It is an amenable number.

126556434302873 is a deficient number, since it is larger than the sum of its proper divisors (1).

126556434302873 is an equidigital number, since it uses as much as digits as its factorization.

126556434302873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87091200, while the sum is 59.

The spelling of 126556434302873 in words is "one hundred twenty-six trillion, five hundred fifty-six billion, four hundred thirty-four million, three hundred two thousand, eight hundred seventy-three".