643258852346 has 8 divisors (see below), whose sum is σ = 1052605394784. Its totient is φ = 292390387420.

The previous prime is 643258852339. The next prime is 643258852363.

643258852346 is nontrivially palindromic in base 10.

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

It is a super-2 number, since 2×643258852346² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 643258852291 and 643258852300.

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, 14619519350 + ... + 14619519393.

It is an arithmetic number, because the mean of its divisors is an integer number (131575674348).

Almost surely, 2^643258852346 is an apocalyptic number.

643258852346 is a deficient number, since it is larger than the sum of its proper divisors (409346542438).

643258852346 is a wasteful number, since it uses less digits than its factorization.

643258852346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29239038756.

The product of its digits is 33177600, while the sum is 56.

The spelling of 643258852346 in words is "six hundred forty-three billion, two hundred fifty-eight million, eight hundred fifty-two thousand, three hundred forty-six".