126839235609 has 32 divisors (see below), whose sum is σ = 190327772800. Its totient is φ = 84515967648.

The previous prime is 126839235587. The next prime is 126839235623. The reversal of 126839235609 is 906532938621.

126839235609 is a `hidden beast` number, since 1 + 2 + 6 + 8 + 3 + 9 + 23 + 5 + 609 = 666.

It is not a de Polignac number, because 126839235609 - 2⁵ = 126839235577 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (126839235629) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4554762 + ... + 4582524.

It is an arithmetic number, because the mean of its divisors is an integer number (5947742900).

Almost surely, 2^126839235609 is an apocalyptic number.

It is an amenable number.

126839235609 is a deficient number, since it is larger than the sum of its proper divisors (63488537191).

126839235609 is an frugal number, since it uses more digits than its factorization.

126839235609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29873 (or 29855 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 54.

The spelling of 126839235609 in words is "one hundred twenty-six billion, eight hundred thirty-nine million, two hundred thirty-five thousand, six hundred nine".