643401280462 has 16 divisors (see below), whose sum is σ = 1000346999040. Its totient is φ = 310156600248.

The previous prime is 643401280447. The next prime is 643401280471. The reversal of 643401280462 is 264082104346.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 51073512 + ... + 51086107.

It is an arithmetic number, because the mean of its divisors is an integer number (62521687440).

Almost surely, 2^643401280462 is an apocalyptic number.

643401280462 is a deficient number, since it is larger than the sum of its proper divisors (356945718578).

643401280462 is a wasteful number, since it uses less digits than its factorization.

643401280462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102159735.

The product of its (nonzero) digits is 221184, while the sum is 40.

The spelling of 643401280462 in words is "six hundred forty-three billion, four hundred one million, two hundred eighty thousand, four hundred sixty-two".