623563645 has 8 divisors (see below), whose sum is σ = 757292256. Its totient is φ = 492840336.

The previous prime is 623563639. The next prime is 623563657. The reversal of 623563645 is 546365326.

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

It is a cyclic number.

It is not a de Polignac number, because 623563645 - 2⁵ = 623563613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 623563598 and 623563607.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 750867 + ... + 751696.

It is an arithmetic number, because the mean of its divisors is an integer number (94661532).

Almost surely, 2^623563645 is an apocalyptic number.

It is an amenable number.

623563645 is a deficient number, since it is larger than the sum of its proper divisors (133728611).

623563645 is a wasteful number, since it uses less digits than its factorization.

623563645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1502651.

The product of its digits is 388800, while the sum is 40.

The square root of 623563645 is about 24971.2563760817. The cubic root of 623563645 is about 854.3325022872.

The spelling of 623563645 in words is "six hundred twenty-three million, five hundred sixty-three thousand, six hundred forty-five".