642853381407 has 8 divisors (see below), whose sum is σ = 857211798576. Its totient is φ = 428531942592.

The previous prime is 642853381369. The next prime is 642853381409. The reversal of 642853381407 is 704183358246.

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 642853381407 - 2⁷ = 642853381279 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 642853381407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642853381409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9203998 + ... + 9273579.

It is an arithmetic number, because the mean of its divisors is an integer number (107151474822).

Almost surely, 2^642853381407 is an apocalyptic number.

642853381407 is a deficient number, since it is larger than the sum of its proper divisors (214358417169).

642853381407 is a wasteful number, since it uses less digits than its factorization.

642853381407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18489177.

The product of its (nonzero) digits is 3870720, while the sum is 51.

The spelling of 642853381407 in words is "six hundred forty-two billion, eight hundred fifty-three million, three hundred eighty-one thousand, four hundred seven".