6504513421 has 8 divisors (see below), whose sum is σ = 7436870784. Its totient is φ = 5572941360.

The previous prime is 6504513419. The next prime is 6504513439. The reversal of 6504513421 is 1243154056.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6504513421 - 2¹ = 6504513419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6504514421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178465 + ... + 211798.

It is an arithmetic number, because the mean of its divisors is an integer number (929608848).

Almost surely, 2^6504513421 is an apocalyptic number.

It is an amenable number.

6504513421 is a deficient number, since it is larger than the sum of its proper divisors (932357363).

6504513421 is a wasteful number, since it uses less digits than its factorization.

6504513421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392651.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 6504513421 is about 80650.5636744096. The cubic root of 6504513421 is about 1866.6874372937.

Adding to 6504513421 its reverse (1243154056), we get a palindrome (7747667477).

The spelling of 6504513421 in words is "six billion, five hundred four million, five hundred thirteen thousand, four hundred twenty-one".