643434040434346 has 8 divisors (see below), whose sum is σ = 1103029783601760. Its totient is φ = 275757445900428.

The previous prime is 643434040434301. The next prime is 643434040434347.

643434040434346 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 = 643434040434293 and 643434040434302.

It is not an unprimeable number, because it can be changed into a prime (643434040434347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22979787158356 + ... + 22979787158383.

It is an arithmetic number, because the mean of its divisors is an integer number (137878722950220).

Almost surely, 2^{643434040434346} is an apocalyptic number.

643434040434346 is a deficient number, since it is larger than the sum of its proper divisors (459595743167414).

643434040434346 is a wasteful number, since it uses less digits than its factorization.

643434040434346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45959574316748.

The product of its (nonzero) digits is 47775744, while the sum is 52.

The spelling of 643434040434346 in words is "six hundred forty-three trillion, four hundred thirty-four billion, forty million, four hundred thirty-four thousand, three hundred forty-six".