643716020932 has 24 divisors (see below), whose sum is σ = 1191583927296. Its totient is φ = 303646863168.

The previous prime is 643716020929. The next prime is 643716020933. The reversal of 643716020932 is 239020617346.

It is not an unprimeable number, because it can be changed into a prime (643716020933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47917348 + ... + 47930779.

It is an arithmetic number, because the mean of its divisors is an integer number (49649330304).

Almost surely, 2^643716020932 is an apocalyptic number.

It is an amenable number.

643716020932 is a deficient number, since it is larger than the sum of its proper divisors (547867906364).

643716020932 is a wasteful number, since it uses less digits than its factorization.

643716020932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95848227 (or 95848225 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 43.

The spelling of 643716020932 in words is "six hundred forty-three billion, seven hundred sixteen million, twenty thousand, nine hundred thirty-two".