643167472244 has 12 divisors (see below), whose sum is σ = 1227865174368. Its totient is φ = 292348851000.

The previous prime is 643167472201. The next prime is 643167472261. The reversal of 643167472244 is 442274761346.

It is a junction number, because it is equal to n+sod(n) for n = 643167472192 and 643167472201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7308721232 + ... + 7308721319.

It is an arithmetic number, because the mean of its divisors is an integer number (102322097864).

Almost surely, 2^643167472244 is an apocalyptic number.

It is an amenable number.

643167472244 is a deficient number, since it is larger than the sum of its proper divisors (584697702124).

643167472244 is a wasteful number, since it uses less digits than its factorization.

643167472244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14617442566 (or 14617442564 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 50.

The spelling of 643167472244 in words is "six hundred forty-three billion, one hundred sixty-seven million, four hundred seventy-two thousand, two hundred forty-four".