643254416242 has 8 divisors (see below), whose sum is σ = 964886693616. Its totient is φ = 321625518372.

The previous prime is 643254416237. The next prime is 643254416251. The reversal of 643254416242 is 242614452346.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 298308 + ... + 1172815.

It is an arithmetic number, because the mean of its divisors is an integer number (120610836702).

Almost surely, 2^643254416242 is an apocalyptic number.

643254416242 is a deficient number, since it is larger than the sum of its proper divisors (321632277374).

643254416242 is a wasteful number, since it uses less digits than its factorization.

643254416242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689752.

The product of its digits is 1105920, while the sum is 43.

Adding to 643254416242 its reverse (242614452346), we get a palindrome (885868868588).

The spelling of 643254416242 in words is "six hundred forty-three billion, two hundred fifty-four million, four hundred sixteen thousand, two hundred forty-two".