642243560615 has 8 divisors (see below), whose sum is σ = 771095155248. Its totient is φ = 513526260160.

The previous prime is 642243560611. The next prime is 642243560639. The reversal of 642243560615 is 516065342246.

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 642243560615 - 2² = 642243560611 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 (642243560611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33563021 + ... + 33582150.

It is an arithmetic number, because the mean of its divisors is an integer number (96386894406).

Almost surely, 2^642243560615 is an apocalyptic number.

642243560615 is a deficient number, since it is larger than the sum of its proper divisors (128851594633).

642243560615 is a wasteful number, since it uses less digits than its factorization.

642243560615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67147089.

The product of its (nonzero) digits is 1036800, while the sum is 44.

The spelling of 642243560615 in words is "six hundred forty-two billion, two hundred forty-three million, five hundred sixty thousand, six hundred fifteen".