642441505204313 has 8 divisors (see below), whose sum is σ = 676924438240800. Its totient is φ = 608025594391488.

The previous prime is 642441505204273. The next prime is 642441505204327. The reversal of 642441505204313 is 313402505144246.

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 642441505204313 - 2¹⁸ = 642441504942169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642441505264313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16755536231 + ... + 16755574572.

It is an arithmetic number, because the mean of its divisors is an integer number (84615554780100).

Almost surely, 2^{642441505204313} is an apocalyptic number.

It is an amenable number.

642441505204313 is a deficient number, since it is larger than the sum of its proper divisors (34482933036487).

642441505204313 is a wasteful number, since it uses less digits than its factorization.

642441505204313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33511111831.

The product of its (nonzero) digits is 1382400, while the sum is 44.

The spelling of 642441505204313 in words is "six hundred forty-two trillion, four hundred forty-one billion, five hundred five million, two hundred four thousand, three hundred thirteen".