643241242142346 has 32 divisors (see below), whose sum is σ = 1292115752898048. Its totient is φ = 213475028659200.

The previous prime is 643241242142287. The next prime is 643241242142351.

It is a happy number.

643241242142346 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 643241242142295 and 643241242142304.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3768391 + ... + 36064986.

It is an arithmetic number, because the mean of its divisors is an integer number (40378617278064).

Almost surely, 2^{643241242142346} is an apocalyptic number.

643241242142346 is an abundant number, since it is smaller than the sum of its proper divisors (648874510755702).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

643241242142346 is a wasteful number, since it uses less digits than its factorization.

643241242142346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39845166.

The product of its digits is 5308416, while the sum is 48.

The spelling of 643241242142346 in words is "six hundred forty-three trillion, two hundred forty-one billion, two hundred forty-two million, one hundred forty-two thousand, three hundred forty-six".