643259972096 has 80 divisors (see below), whose sum is σ = 1555277080896. Its totient is φ = 259466182656.

The previous prime is 643259972093. The next prime is 643259972101. The reversal of 643259972096 is 690279952346.

It is not an unprimeable number, because it can be changed into a prime (643259972093) 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, 5217926 + ... + 5339781.

Almost surely, 2^643259972096 is an apocalyptic number.

It is an amenable number.

643259972096 is an abundant number, since it is smaller than the sum of its proper divisors (912017108800).

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

643259972096 is a wasteful number, since it uses less digits than its factorization.

643259972096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10557749 (or 10557733 counting only the distinct ones).

The product of its (nonzero) digits is 44089920, while the sum is 62.

The spelling of 643259972096 in words is "six hundred forty-three billion, two hundred fifty-nine million, nine hundred seventy-two thousand, ninety-six".