642542416718 has 4 divisors (see below), whose sum is σ = 963813625080. Its totient is φ = 321271208358.

The previous prime is 642542416717. The next prime is 642542416741. The reversal of 642542416718 is 817614245246.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642542416717) 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 as a sum of consecutive naturals, namely, 160635604178 + ... + 160635604181.

It is an arithmetic number, because the mean of its divisors is an integer number (240953406270).

Almost surely, 2^642542416718 is an apocalyptic number.

642542416718 is a deficient number, since it is larger than the sum of its proper divisors (321271208362).

642542416718 is a wasteful number, since it uses less digits than its factorization.

642542416718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321271208361.

The product of its digits is 2580480, while the sum is 50.

The spelling of 642542416718 in words is "six hundred forty-two billion, five hundred forty-two million, four hundred sixteen thousand, seven hundred eighteen".