6503436816 has 40 divisors (see below), whose sum is σ = 16816393920. Its totient is φ = 2165767296.

The previous prime is 6503436799. The next prime is 6503436833. The reversal of 6503436816 is 6186343056.

It is an interprime number because it is at equal distance from previous prime (6503436799) and next prime (6503436833).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12060 + ... + 114683.

It is an arithmetic number, because the mean of its divisors is an integer number (420409848).

Almost surely, 2^6503436816 is an apocalyptic number.

It is an amenable number.

6503436816 is an abundant number, since it is smaller than the sum of its proper divisors (10312957104).

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

6503436816 is a wasteful number, since it uses less digits than its factorization.

6503436816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127823 (or 127817 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

The square root of 6503436816 is about 80643.8888943235. Note that the first 4 decimals coincide. The cubic root of 6503436816 is about 1866.5844423532.

The spelling of 6503436816 in words is "six billion, five hundred three million, four hundred thirty-six thousand, eight hundred sixteen".