642353202353247 has 64 divisors (see below), whose sum is σ = 1069622809694208. Its totient is φ = 333122862240000.

The previous prime is 642353202353209. The next prime is 642353202353249. The reversal of 642353202353247 is 742353202353246.

It is a happy number.

It is not a de Polignac number, because 642353202353247 - 2¹⁰ = 642353202352223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 642353202353247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642353202353249) 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 in 63 ways as a sum of consecutive naturals, for example, 4966059028 + ... + 4966188374.

It is an arithmetic number, because the mean of its divisors is an integer number (16712856401472).

Almost surely, 2^{642353202353247} is an apocalyptic number.

642353202353247 is a deficient number, since it is larger than the sum of its proper divisors (427269607340961).

642353202353247 is a wasteful number, since it uses less digits than its factorization.

642353202353247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165740.

The product of its (nonzero) digits is 21772800, while the sum is 51.

Subtracting 642353202353247 from its reverse (742353202353246), we obtain a palindrome (99999999999999).

The spelling of 642353202353247 in words is "six hundred forty-two trillion, three hundred fifty-three billion, two hundred two million, three hundred fifty-three thousand, two hundred forty-seven".