642773044726 has 8 divisors (see below), whose sum is σ = 995261488704. Its totient is φ = 311019215160.

The previous prime is 642773044723. The next prime is 642773044747. The reversal of 642773044726 is 627440377246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642773044723) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5183653525 + ... + 5183653648.

It is an arithmetic number, because the mean of its divisors is an integer number (124407686088).

Almost surely, 2^642773044726 is an apocalyptic number.

642773044726 is a deficient number, since it is larger than the sum of its proper divisors (352488443978).

642773044726 is a wasteful number, since it uses less digits than its factorization.

642773044726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10367307206.

The product of its (nonzero) digits is 9483264, while the sum is 52.

The spelling of 642773044726 in words is "six hundred forty-two billion, seven hundred seventy-three million, forty-four thousand, seven hundred twenty-six".