643171095352 has 8 divisors (see below), whose sum is σ = 1205945803800. Its totient is φ = 321585547672.

The previous prime is 643171095337. The next prime is 643171095407. The reversal of 643171095352 is 253590171346.

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 40198193452 + ... + 40198193467.

It is an arithmetic number, because the mean of its divisors is an integer number (150743225475).

Almost surely, 2^643171095352 is an apocalyptic number.

It is an amenable number.

643171095352 is a deficient number, since it is larger than the sum of its proper divisors (562774708448).

643171095352 is a wasteful number, since it uses less digits than its factorization.

643171095352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80396386925 (or 80396386921 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 46.

The spelling of 643171095352 in words is "six hundred forty-three billion, one hundred seventy-one million, ninety-five thousand, three hundred fifty-two".