642553764709 has 8 divisors (see below), whose sum is σ = 688548047040. Its totient is φ = 597470260416.

The previous prime is 642553764563. The next prime is 642553764719. The reversal of 642553764709 is 907467355246.

642553764709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 642553764709 - 2²³ = 642545376101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642553764719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227693049 + ... + 227695870.

It is an arithmetic number, because the mean of its divisors is an integer number (86068505880).

Almost surely, 2^642553764709 is an apocalyptic number.

It is an amenable number.

642553764709 is a deficient number, since it is larger than the sum of its proper divisors (45994282331).

642553764709 is a wasteful number, since it uses less digits than its factorization.

642553764709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455389019.

The product of its (nonzero) digits is 38102400, while the sum is 58.

The spelling of 642553764709 in words is "six hundred forty-two billion, five hundred fifty-three million, seven hundred sixty-four thousand, seven hundred nine".