6400355532 has 48 divisors (see below), whose sum is σ = 15012678240. Its totient is φ = 2122266112.

The previous prime is 6400355527. The next prime is 6400355539. The reversal of 6400355532 is 2355530046.

It is a junction number, because it is equal to n+sod(n) for n = 6400355493 and 6400355502.

It is not an unprimeable number, because it can be changed into a prime (6400355539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2162998 + ... + 2165954.

It is an arithmetic number, because the mean of its divisors is an integer number (312764130).

Almost surely, 2^6400355532 is an apocalyptic number.

It is an amenable number.

6400355532 is an abundant number, since it is smaller than the sum of its proper divisors (8612322708).

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

6400355532 is a wasteful number, since it uses less digits than its factorization.

6400355532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3850 (or 3848 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 33.

The square root of 6400355532 is about 80002.2220441407. Note that the first 3 decimals coincide. The cubic root of 6400355532 is about 1856.6699126702.

Adding to 6400355532 its reverse (2355530046), we get a palindrome (8755885578).

The spelling of 6400355532 in words is "six billion, four hundred million, three hundred fifty-five thousand, five hundred thirty-two".