126542494069 has 2 divisors, whose sum is σ = 126542494070. Its totient is φ = 126542494068.

The previous prime is 126542494061. The next prime is 126542494093. The reversal of 126542494069 is 960494245621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102999274225 + 23543219844 = 320935^2 + 153438^2 .

It is an emirp because it is prime and its reverse (960494245621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126542494069 - 2³ = 126542494061 is a prime.

It is a super-2 number, since 2×126542494069² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126542494061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63271247034 + 63271247035.

It is an arithmetic number, because the mean of its divisors is an integer number (63271247035).

Almost surely, 2^126542494069 is an apocalyptic number.

It is an amenable number.

126542494069 is a deficient number, since it is larger than the sum of its proper divisors (1).

126542494069 is an equidigital number, since it uses as much as digits as its factorization.

126542494069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3732480, while the sum is 52.

The spelling of 126542494069 in words is "one hundred twenty-six billion, five hundred forty-two million, four hundred ninety-four thousand, sixty-nine".