123726808536 has 32 divisors (see below), whose sum is σ = 315898237440. Its totient is φ = 40364774048.

The previous prime is 123726808493. The next prime is 123726808549. The reversal of 123726808536 is 635808627321.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54842316 + ... + 54844571.

It is an arithmetic number, because the mean of its divisors is an integer number (9871819920).

Almost surely, 2^123726808536 is an apocalyptic number.

It is an amenable number.

123726808536 is an abundant number, since it is smaller than the sum of its proper divisors (192171428904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123726808536 is a wasteful number, since it uses less digits than its factorization.

123726808536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109686943 (or 109686939 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 51.

The spelling of 123726808536 in words is "one hundred twenty-three billion, seven hundred twenty-six million, eight hundred eight thousand, five hundred thirty-six".