6400406532 has 36 divisors (see below), whose sum is σ = 16171446480. Its totient is φ = 1969355232.

The previous prime is 6400406521. The next prime is 6400406549. The reversal of 6400406532 is 2356040046.

It is a self number, because there is not a number n which added to its sum of digits gives 6400406532.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1575982 + ... + 1580037.

Almost surely, 2^6400406532 is an apocalyptic number.

It is an amenable number.

6400406532 is an abundant number, since it is smaller than the sum of its proper divisors (9771039948).

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

6400406532 is a wasteful number, since it uses less digits than its factorization.

6400406532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3156052 (or 3156037 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 6400406532 is about 80002.5407846526. The cubic root of 6400406532 is about 1856.6748441626.

Adding to 6400406532 its reverse (2356040046), we get a palindrome (8756446578).

The spelling of 6400406532 in words is "six billion, four hundred million, four hundred six thousand, five hundred thirty-two".