642312516143 has 8 divisors (see below), whose sum is σ = 651953692368. Its totient is φ = 632694106944.

The previous prime is 642312516113. The next prime is 642312516161. The reversal of 642312516143 is 341615213246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-642312516143 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 642312516097 and 642312516106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642312516113) 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, 5634905 + ... + 5747762.

It is an arithmetic number, because the mean of its divisors is an integer number (81494211546).

Almost surely, 2^642312516143 is an apocalyptic number.

642312516143 is a deficient number, since it is larger than the sum of its proper divisors (9641176225).

642312516143 is a wasteful number, since it uses less digits than its factorization.

642312516143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11383513.

The product of its digits is 103680, while the sum is 38.

Adding to 642312516143 its reverse (341615213246), we get a palindrome (983927729389).

The spelling of 642312516143 in words is "six hundred forty-two billion, three hundred twelve million, five hundred sixteen thousand, one hundred forty-three".