639622469503 has 4 divisors (see below), whose sum is σ = 639707499288. Its totient is φ = 639537439720.

The previous prime is 639622469459. The next prime is 639622469513. The reversal of 639622469503 is 305964226936.

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 639622469503 - 2¹⁷ = 639622338431 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 (639622469513) 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, 42503608 + ... + 42518653.

It is an arithmetic number, because the mean of its divisors is an integer number (159926874822).

Almost surely, 2^639622469503 is an apocalyptic number.

639622469503 is a deficient number, since it is larger than the sum of its proper divisors (85029785).

639622469503 is an equidigital number, since it uses as much as digits as its factorization.

639622469503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85029784.

The product of its (nonzero) digits is 12597120, while the sum is 55.

The spelling of 639622469503 in words is "six hundred thirty-nine billion, six hundred twenty-two million, four hundred sixty-nine thousand, five hundred three".