6643901432 has 32 divisors (see below), whose sum is σ = 14243299200. Its totient is φ = 2846112864.

The previous prime is 6643901419. The next prime is 6643901471. The reversal of 6643901432 is 2341093466.

It is a happy number.

It is a zygodrome in base 2.

It is a congruent number.

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, 105623 + ... + 156345.

It is an arithmetic number, because the mean of its divisors is an integer number (445103100).

Almost surely, 2^6643901432 is an apocalyptic number.

It is an amenable number.

6643901432 is an abundant number, since it is smaller than the sum of its proper divisors (7599397768).

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

6643901432 is a wasteful number, since it uses less digits than its factorization.

6643901432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53075 (or 53071 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 38.

The square root of 6643901432 is about 81510.1308550048. The cubic root of 6643901432 is about 1879.9273240353.

Adding to 6643901432 its reverse (2341093466), we get a palindrome (8984994898).

The spelling of 6643901432 in words is "six billion, six hundred forty-three million, nine hundred one thousand, four hundred thirty-two".