6503405420 has 48 divisors (see below), whose sum is σ = 14476408128. Its totient is φ = 2445649920.

The previous prime is 6503405407. The next prime is 6503405473. The reversal of 6503405420 is 245043056.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 313985 + ... + 334055.

It is an arithmetic number, because the mean of its divisors is an integer number (301591836).

Almost surely, 2^6503405420 is an apocalyptic number.

It is an amenable number.

6503405420 is an abundant number, since it is smaller than the sum of its proper divisors (7973002708).

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

6503405420 is a wasteful number, since it uses less digits than its factorization.

6503405420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21050 (or 21048 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 6503405420 is about 80643.6942358173. The cubic root of 6503405420 is about 1866.5814386399.

Adding to 6503405420 its reverse (245043056), we get a palindrome (6748448476).

The spelling of 6503405420 in words is "six billion, five hundred three million, four hundred five thousand, four hundred twenty".