623645575 has 24 divisors (see below), whose sum is σ = 922226688. Its totient is φ = 409046880.

The previous prime is 623645563. The next prime is 623645579. The reversal of 623645575 is 575546326.

It is not a de Polignac number, because 623645575 - 2¹³ = 623637383 is a prime.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623645579) 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 23 ways as a sum of consecutive naturals, for example, 73447 + ... + 81496.

It is an arithmetic number, because the mean of its divisors is an integer number (38426112).

Almost surely, 2^623645575 is an apocalyptic number.

623645575 is a deficient number, since it is larger than the sum of its proper divisors (298581113).

623645575 is a wasteful number, since it uses less digits than its factorization.

623645575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154983 (or 154978 counting only the distinct ones).

The product of its digits is 756000, while the sum is 43.

The square root of 623645575 is about 24972.8968083400. The cubic root of 623645575 is about 854.3699175519.

The spelling of 623645575 in words is "six hundred twenty-three million, six hundred forty-five thousand, five hundred seventy-five".