642234722065 has 8 divisors (see below), whose sum is σ = 773159744448. Its totient is φ = 512135725680.

The previous prime is 642234722021. The next prime is 642234722081. The reversal of 642234722065 is 560227432246.

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 642234722065 - 2¹³ = 642234713873 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, 206504787 + ... + 206507896.

It is an arithmetic number, because the mean of its divisors is an integer number (96644968056).

Almost surely, 2^642234722065 is an apocalyptic number.

It is an amenable number.

642234722065 is a deficient number, since it is larger than the sum of its proper divisors (130925022383).

642234722065 is a wasteful number, since it uses less digits than its factorization.

642234722065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413012999.

The product of its (nonzero) digits is 967680, while the sum is 43.

The spelling of 642234722065 in words is "six hundred forty-two billion, two hundred thirty-four million, seven hundred twenty-two thousand, sixty-five".