6420415520 has 48 divisors (see below), whose sum is σ = 15174407808. Its totient is φ = 2567120640.

The previous prime is 6420415511. The next prime is 6420415537. The reversal of 6420415520 is 255140246.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 475097 + ... + 488423.

It is an arithmetic number, because the mean of its divisors is an integer number (316133496).

Almost surely, 2^6420415520 is an apocalyptic number.

It is an amenable number.

6420415520 is an abundant number, since it is smaller than the sum of its proper divisors (8753992288).

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

6420415520 is a wasteful number, since it uses less digits than its factorization.

6420415520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16353 (or 16345 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 6420415520 is about 80127.4954057594. The cubic root of 6420415520 is about 1858.6076140342.

Adding to 6420415520 its reverse (255140246), we get a palindrome (6675555766).

The spelling of 6420415520 in words is "six billion, four hundred twenty million, four hundred fifteen thousand, five hundred twenty".