642243560616 has 96 divisors (see below), whose sum is σ = 2092522910400. Its totient is φ = 173840359680.

The previous prime is 642243560611. The next prime is 642243560639. The reversal of 642243560616 is 616065342246.

It is a happy number.

642243560616 is a `hidden beast` number, since 6 + 4 + 2 + 2 + 4 + 35 + 606 + 1 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (642243560611) 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, 33524445 + ... + 33543596.

It is an arithmetic number, because the mean of its divisors is an integer number (21797113650).

Almost surely, 2^642243560616 is an apocalyptic number.

It is an amenable number.

642243560616 is an abundant number, since it is smaller than the sum of its proper divisors (1450279349784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642243560616 is a wasteful number, since it uses less digits than its factorization.

642243560616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67068079 (or 67068072 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 45.

The spelling of 642243560616 in words is "six hundred forty-two billion, two hundred forty-three million, five hundred sixty thousand, six hundred sixteen".