126642789534077 has 2 divisors, whose sum is σ = 126642789534078. Its totient is φ = 126642789534076.

The previous prime is 126642789534011. The next prime is 126642789534091. The reversal of 126642789534077 is 770435987246621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106260038679001 + 20382750855076 = 10308251^2 + 4514726^2 .

It is a cyclic number.

It is not a de Polignac number, because 126642789534077 - 2³² = 126638494566781 is a prime.

It is a super-2 number, since 2×126642789534077² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 126642789534077.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126642789534097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63321394767038 + 63321394767039.

It is an arithmetic number, because the mean of its divisors is an integer number (63321394767039).

It is a 2-persistent number, because it is pandigital, and so is 2⋅126642789534077 = 253285579068154, but 3⋅126642789534077 = 379928368602231 is not.

Almost surely, 2^{126642789534077} is an apocalyptic number.

It is an amenable number.

126642789534077 is a deficient number, since it is larger than the sum of its proper divisors (1).

126642789534077 is an equidigital number, since it uses as much as digits as its factorization.

126642789534077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 853493760, while the sum is 71.

The spelling of 126642789534077 in words is "one hundred twenty-six trillion, six hundred forty-two billion, seven hundred eighty-nine million, five hundred thirty-four thousand, seventy-seven".