6540513400 has 48 divisors (see below), whose sum is σ = 15219450000. Its totient is φ = 2614010880.

The previous prime is 6540513379. The next prime is 6540513433. The reversal of 6540513400 is 43150456.

It is a congruent number.

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, 236709 + ... + 262891.

It is an arithmetic number, because the mean of its divisors is an integer number (317071875).

Almost surely, 2^6540513400 is an apocalyptic number.

It is an amenable number.

6540513400 is an abundant number, since it is smaller than the sum of its proper divisors (8678936600).

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

6540513400 is a wasteful number, since it uses less digits than its factorization.

6540513400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27448 (or 27439 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 6540513400 is about 80873.4406341167. The cubic root of 6540513400 is about 1870.1249022924.

Adding to 6540513400 its reverse (43150456), we get a palindrome (6583663856).

The spelling of 6540513400 in words is "six billion, five hundred forty million, five hundred thirteen thousand, four hundred".