6400364503 has 4 divisors (see below), whose sum is σ = 6892700248. Its totient is φ = 5908028760.

The previous prime is 6400364471. The next prime is 6400364513. The reversal of 6400364503 is 3054630046.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6400364503 - 2⁵ = 6400364471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6400364513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246167853 + ... + 246167878.

It is an arithmetic number, because the mean of its divisors is an integer number (1723175062).

Almost surely, 2^6400364503 is an apocalyptic number.

6400364503 is a deficient number, since it is larger than the sum of its proper divisors (492335745).

6400364503 is a wasteful number, since it uses less digits than its factorization.

6400364503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492335744.

The product of its (nonzero) digits is 25920, while the sum is 31.

The square root of 6400364503 is about 80002.2781113138. The cubic root of 6400364503 is about 1856.6707801313.

Adding to 6400364503 its reverse (3054630046), we get a palindrome (9454994549).

The spelling of 6400364503 in words is "six billion, four hundred million, three hundred sixty-four thousand, five hundred three".