643367763346 has 24 divisors (see below), whose sum is σ = 1224666653616. Its totient is φ = 250662764520.

The previous prime is 643367763257. The next prime is 643367763349.

It is a happy number.

643367763346 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×643367763346² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (643367763349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 298406976 + ... + 298409131.

It is an arithmetic number, because the mean of its divisors is an integer number (51027777234).

Almost surely, 2^643367763346 is an apocalyptic number.

643367763346 is a deficient number, since it is larger than the sum of its proper divisors (581298890270).

643367763346 is a wasteful number, since it uses less digits than its factorization.

643367763346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596816134 (or 596816127 counting only the distinct ones).

The product of its digits is 82301184, while the sum is 58.

The spelling of 643367763346 in words is "six hundred forty-three billion, three hundred sixty-seven million, seven hundred sixty-three thousand, three hundred forty-six".