643082280346 has 16 divisors (see below), whose sum is σ = 1052376792480. Its totient is φ = 292293368080.

The previous prime is 643082280341. The next prime is 643082280349.

643082280346 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×643082280346² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 643082280296 and 643082280305.

It is not an unprimeable number, because it can be changed into a prime (643082280341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 441361 + ... + 1216948.

It is an arithmetic number, because the mean of its divisors is an integer number (65773549530).

Almost surely, 2^643082280346 is an apocalyptic number.

643082280346 is a deficient number, since it is larger than the sum of its proper divisors (409294512134).

643082280346 is a wasteful number, since it uses less digits than its factorization.

643082280346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1675949.

The product of its (nonzero) digits is 1327104, while the sum is 46.

The spelling of 643082280346 in words is "six hundred forty-three billion, eighty-two million, two hundred eighty thousand, three hundred forty-six".