126642113899 has 4 divisors (see below), whose sum is σ = 144733844464. Its totient is φ = 108550383336.

The previous prime is 126642113893. The next prime is 126642113953. The reversal of 126642113899 is 998311246621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 126642113899 - 2⁹ = 126642113387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126642113893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9045865272 + ... + 9045865285.

It is an arithmetic number, because the mean of its divisors is an integer number (36183461116).

Almost surely, 2^126642113899 is an apocalyptic number.

126642113899 is a deficient number, since it is larger than the sum of its proper divisors (18091730565).

126642113899 is an equidigital number, since it uses as much as digits as its factorization.

126642113899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18091730564.

The product of its digits is 1119744, while the sum is 52.

The spelling of 126642113899 in words is "one hundred twenty-six billion, six hundred forty-two million, one hundred thirteen thousand, eight hundred ninety-nine".