126242873867 has 4 divisors (see below), whose sum is σ = 137719498776. Its totient is φ = 114766248960.

The previous prime is 126242873837. The next prime is 126242873891. The reversal of 126242873867 is 768378242621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 768378242621 = 11 ⋅69852567511.

It is not a de Polignac number, because 126242873867 - 2¹⁰ = 126242872843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126242873837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5738312438 + ... + 5738312459.

It is an arithmetic number, because the mean of its divisors is an integer number (34429874694).

Almost surely, 2^126242873867 is an apocalyptic number.

126242873867 is a deficient number, since it is larger than the sum of its proper divisors (11476624909).

126242873867 is a wasteful number, since it uses less digits than its factorization.

126242873867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11476624908.

The product of its digits is 10838016, while the sum is 56.

The spelling of 126242873867 in words is "one hundred twenty-six billion, two hundred forty-two million, eight hundred seventy-three thousand, eight hundred sixty-seven".