642236560585 has 8 divisors (see below), whose sum is σ = 772253496576. Its totient is φ = 512742832560.

The previous prime is 642236560571. The next prime is 642236560607. The reversal of 642236560585 is 585065632246.

It is a happy number.

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

It is not a de Polignac number, because 642236560585 - 2¹⁵ = 642236527817 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130799289 + ... + 130804198.

It is an arithmetic number, because the mean of its divisors is an integer number (96531687072).

Almost surely, 2^642236560585 is an apocalyptic number.

It is an amenable number.

642236560585 is a deficient number, since it is larger than the sum of its proper divisors (130016935991).

642236560585 is a wasteful number, since it uses less digits than its factorization.

642236560585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261603983.

The product of its (nonzero) digits is 10368000, while the sum is 52.

The spelling of 642236560585 in words is "six hundred forty-two billion, two hundred thirty-six million, five hundred sixty thousand, five hundred eighty-five".