643676676346 has 32 divisors (see below), whose sum is σ = 1062105240960. Its totient is φ = 290138112000.

The previous prime is 643676676337. The next prime is 643676676347.

643676676346 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (643676676347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1748890 + ... + 2084698.

It is an arithmetic number, because the mean of its divisors is an integer number (33190788780).

Almost surely, 2^643676676346 is an apocalyptic number.

643676676346 is a deficient number, since it is larger than the sum of its proper divisors (418428564614).

643676676346 is a wasteful number, since it uses less digits than its factorization.

643676676346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336550.

The product of its digits is 329204736, while the sum is 64.

The spelling of 643676676346 in words is "six hundred forty-three billion, six hundred seventy-six million, six hundred seventy-six thousand, three hundred forty-six".