642413056321 has 8 divisors (see below), whose sum is σ = 680373596160. Its totient is φ = 604471576128.

The previous prime is 642413056297. The next prime is 642413056343. The reversal of 642413056321 is 123650314246.

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 642413056321 - 2¹¹ = 642413054273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642413056721) 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, 4695481 + ... + 4830358.

It is an arithmetic number, because the mean of its divisors is an integer number (85046699520).

Almost surely, 2^642413056321 is an apocalyptic number.

It is an amenable number.

642413056321 is a deficient number, since it is larger than the sum of its proper divisors (37960539839).

642413056321 is a wasteful number, since it uses less digits than its factorization.

642413056321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9529823.

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 642413056321 in words is "six hundred forty-two billion, four hundred thirteen million, fifty-six thousand, three hundred twenty-one".