6420415636 has 96 divisors (see below), whose sum is σ = 12541132800. Its totient is φ = 2863511040.

The previous prime is 6420415621. The next prime is 6420415649. The reversal of 6420415636 is 6365140246.

It is a junction number, because it is equal to n+sod(n) for n = 6420415595 and 6420415604.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14896341 + ... + 14896771.

It is an arithmetic number, because the mean of its divisors is an integer number (130636800).

Almost surely, 2^6420415636 is an apocalyptic number.

It is an amenable number.

6420415636 is a deficient number, since it is larger than the sum of its proper divisors (6120717164).

6420415636 is a wasteful number, since it uses less digits than its factorization.

6420415636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637 (or 635 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 6420415636 is about 80127.4961296058. The cubic root of 6420415636 is about 1858.6076252275.

The spelling of 6420415636 in words is "six billion, four hundred twenty million, four hundred fifteen thousand, six hundred thirty-six".