6442520503 has 4 divisors (see below), whose sum is σ = 6443701840. Its totient is φ = 6441339168.

The previous prime is 6442520473. The next prime is 6442520509. The reversal of 6442520503 is 3050252446.

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 6442520503 - 2⁹ = 6442519991 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 (6442520509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 582450 + ... + 593407.

It is an arithmetic number, because the mean of its divisors is an integer number (1610925460).

Almost surely, 2^6442520503 is an apocalyptic number.

6442520503 is a deficient number, since it is larger than the sum of its proper divisors (1181337).

6442520503 is a wasteful number, since it uses less digits than its factorization.

6442520503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181336.

The product of its (nonzero) digits is 28800, while the sum is 31.

The square root of 6442520503 is about 80265.3131994139. The cubic root of 6442520503 is about 1860.7381837949.

Adding to 6442520503 its reverse (3050252446), we get a palindrome (9492772949).

The spelling of 6442520503 in words is "six billion, four hundred forty-two million, five hundred twenty thousand, five hundred three".