643431505134346 has 8 divisors (see below), whose sum is σ = 965152731852000. Its totient is φ = 321713927850348.

The previous prime is 643431505134269. The next prime is 643431505134361.

643431505134346 is nontrivially palindromic in base 10.

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

It is a junction number, because it is equal to n+sod(n) for n = 643431505134293 and 643431505134302.

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, 911917596 + ... + 912622903.

It is an arithmetic number, because the mean of its divisors is an integer number (120644091481500).

Almost surely, 2^{643431505134346} is an apocalyptic number.

643431505134346 is a deficient number, since it is larger than the sum of its proper divisors (321721226717654).

643431505134346 is a wasteful number, since it uses less digits than its factorization.

643431505134346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824716828.

The product of its (nonzero) digits is 18662400, while the sum is 52.

It can be divided in two parts, 64343150 and 5134346, that added together give a palindrome (69477496).

The spelling of 643431505134346 in words is "six hundred forty-three trillion, four hundred thirty-one billion, five hundred five million, one hundred thirty-four thousand, three hundred forty-six".