623645563503 has 8 divisors (see below), whose sum is σ = 842918204848. Its totient is φ = 410068315584.

The previous prime is 623645563493. The next prime is 623645563573. The reversal of 623645563503 is 305365546326.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 623645563503 - 2²⁸ = 623377128047 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 (623645563573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1423848100 + ... + 1423848537.

It is an arithmetic number, because the mean of its divisors is an integer number (105364775606).

Almost surely, 2^623645563503 is an apocalyptic number.

623645563503 is a deficient number, since it is larger than the sum of its proper divisors (219272641345).

623645563503 is a wasteful number, since it uses less digits than its factorization.

623645563503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2847696713.

The product of its (nonzero) digits is 5832000, while the sum is 48.

The spelling of 623645563503 in words is "six hundred twenty-three billion, six hundred forty-five million, five hundred sixty-three thousand, five hundred three".