6432371638320 has 40 divisors (see below), whose sum is σ = 19940352079536. Its totient is φ = 1715299103488.

The previous prime is 6432371638309. The next prime is 6432371638333. The reversal of 6432371638320 is 238361732346.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 6432371638320.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13400774007 + ... + 13400774486.

Almost surely, 2^{6432371638320} is an apocalyptic number.

6432371638320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6432371638320 is an abundant number, since it is smaller than the sum of its proper divisors (13507980441216).

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

6432371638320 is a wasteful number, since it uses less digits than its factorization.

6432371638320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26801548509 (or 26801548503 counting only the distinct ones).

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

The spelling of 6432371638320 in words is "six trillion, four hundred thirty-two billion, three hundred seventy-one million, six hundred thirty-eight thousand, three hundred twenty".