642552563 has 8 divisors (see below), whose sum is σ = 648192000. Its totient is φ = 636922440.

The previous prime is 642552523. The next prime is 642552577. The reversal of 642552563 is 365255246.

642552563 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 642552563 - 2⁸ = 642552307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642552503) 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, 252608 + ... + 255138.

It is an arithmetic number, because the mean of its divisors is an integer number (81024000).

Almost surely, 2^642552563 is an apocalyptic number.

642552563 is a deficient number, since it is larger than the sum of its proper divisors (5639437).

642552563 is a wasteful number, since it uses less digits than its factorization.

642552563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4657.

The product of its digits is 216000, while the sum is 38.

The square root of 642552563 is about 25348.6205344591. The cubic root of 642552563 is about 862.9180500322.

The spelling of 642552563 in words is "six hundred forty-two million, five hundred fifty-two thousand, five hundred sixty-three".