642370155633717 has 24 divisors (see below), whose sum is σ = 996330480156000. Its totient is φ = 367068196456416.

The previous prime is 642370155633709. The next prime is 642370155633719. The reversal of 642370155633717 is 717336551073246.

642370155633717 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 642370155633717 - 2³ = 642370155633709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642370155633719) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 138416659 + ... + 142982207.

It is an arithmetic number, because the mean of its divisors is an integer number (41513770006500).

Almost surely, 2^{642370155633717} is an apocalyptic number.

It is an amenable number.

642370155633717 is a deficient number, since it is larger than the sum of its proper divisors (353960324522283).

642370155633717 is a wasteful number, since it uses less digits than its factorization.

642370155633717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5522705 (or 5522698 counting only the distinct ones).

The product of its (nonzero) digits is 66679200, while the sum is 60.

The spelling of 642370155633717 in words is "six hundred forty-two trillion, three hundred seventy billion, one hundred fifty-five million, six hundred thirty-three thousand, seven hundred seventeen".