642063514643 has 4 divisors (see below), whose sum is σ = 657723600408. Its totient is φ = 626403428880.

The previous prime is 642063514637. The next prime is 642063514667. The reversal of 642063514643 is 346415360246.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 642063514643 - 2⁶ = 642063514579 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 642063514594 and 642063514603.

It is not an unprimeable number, because it can be changed into a prime (642063514693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7830042821 + ... + 7830042902.

It is an arithmetic number, because the mean of its divisors is an integer number (164430900102).

Almost surely, 2^642063514643 is an apocalyptic number.

642063514643 is a deficient number, since it is larger than the sum of its proper divisors (15660085765).

642063514643 is a wasteful number, since it uses less digits than its factorization.

642063514643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15660085764.

The product of its (nonzero) digits is 1244160, while the sum is 44.

Adding to 642063514643 its reverse (346415360246), we get a palindrome (988478874889).

The spelling of 642063514643 in words is "six hundred forty-two billion, sixty-three million, five hundred fourteen thousand, six hundred forty-three".