126204418667 has 4 divisors (see below), whose sum is σ = 126728088696. Its totient is φ = 125680748640.

The previous prime is 126204418663. The next prime is 126204418687. The reversal of 126204418667 is 766814402621.

It is a happy number.

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 126204418667 - 2² = 126204418663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126204418663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261834653 + ... + 261835134.

It is an arithmetic number, because the mean of its divisors is an integer number (31682022174).

Almost surely, 2^126204418667 is an apocalyptic number.

126204418667 is a deficient number, since it is larger than the sum of its proper divisors (523670029).

126204418667 is an equidigital number, since it uses as much as digits as its factorization.

126204418667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523670028.

The product of its (nonzero) digits is 774144, while the sum is 47.

The spelling of 126204418667 in words is "one hundred twenty-six billion, two hundred four million, four hundred eighteen thousand, six hundred sixty-seven".