126506997139 has 16 divisors (see below), whose sum is σ = 139041207936. Its totient is φ = 114621696000.

The previous prime is 126506997137. The next prime is 126506997151. The reversal of 126506997139 is 931799605621.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 126506997139 - 2¹ = 126506997137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126506997137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1249062 + ... + 1346539.

It is an arithmetic number, because the mean of its divisors is an integer number (8690075496).

Almost surely, 2^126506997139 is an apocalyptic number.

126506997139 is a deficient number, since it is larger than the sum of its proper divisors (12534210797).

126506997139 is a wasteful number, since it uses less digits than its factorization.

126506997139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2595726.

The product of its (nonzero) digits is 5511240, while the sum is 58.

The spelling of 126506997139 in words is "one hundred twenty-six billion, five hundred six million, nine hundred ninety-seven thousand, one hundred thirty-nine".