643263362346 has 64 divisors (see below), whose sum is σ = 1433592815616. Its totient is φ = 190747905600.

The previous prime is 643263362297. The next prime is 643263362377.

643263362346 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 643263362295 and 643263362304.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 22484511 + ... + 22513101.

It is an arithmetic number, because the mean of its divisors is an integer number (22399887744).

Almost surely, 2^643263362346 is an apocalyptic number.

643263362346 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

643263362346 is an abundant number, since it is smaller than the sum of its proper divisors (790329453270).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

643263362346 is a wasteful number, since it uses less digits than its factorization.

643263362346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35907.

The product of its digits is 6718464, while the sum is 48.

The spelling of 643263362346 in words is "six hundred forty-three billion, two hundred sixty-three million, three hundred sixty-two thousand, three hundred forty-six".