642853620287 has 2 divisors, whose sum is σ = 642853620288. Its totient is φ = 642853620286.

The previous prime is 642853620281. The next prime is 642853620289. The reversal of 642853620287 is 782026358246.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 642853620287 - 2³⁴ = 625673751103 is a prime.

It is a super-2 number, since 2×642853620287² (a number of 24 digits) contains 22 as substring.

Together with 642853620289, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642853620281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321426810143 + 321426810144.

It is an arithmetic number, because the mean of its divisors is an integer number (321426810144).

Almost surely, 2^642853620287 is an apocalyptic number.

642853620287 is a deficient number, since it is larger than the sum of its proper divisors (1).

642853620287 is an equidigital number, since it uses as much as digits as its factorization.

642853620287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7741440, while the sum is 53.

The spelling of 642853620287 in words is "six hundred forty-two billion, eight hundred fifty-three million, six hundred twenty thousand, two hundred eighty-seven".