643237163832 has 16 divisors (see below), whose sum is σ = 1608092909640. Its totient is φ = 214412387936.

The previous prime is 643237163827. The next prime is 643237163839. The reversal of 643237163832 is 238361732346.

643237163832 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643237163839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13400774223 + ... + 13400774270.

Almost surely, 2^643237163832 is an apocalyptic number.

It is an amenable number.

643237163832 is an abundant number, since it is smaller than the sum of its proper divisors (964855745808).

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

643237163832 is a wasteful number, since it uses less digits than its factorization.

643237163832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26801548502 (or 26801548498 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 48.

The spelling of 643237163832 in words is "six hundred forty-three billion, two hundred thirty-seven million, one hundred sixty-three thousand, eight hundred thirty-two".