6545623 has 6 divisors (see below), whose sum is σ = 7488456. Its totient is φ = 5604732.

The previous prime is 6545621. The next prime is 6545641. The reversal of 6545623 is 3265456.

It is not a de Polignac number, because 6545623 - 2¹ = 6545621 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6545621) 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 5 ways as a sum of consecutive naturals, for example, 6286 + ... + 7252.

It is an arithmetic number, because the mean of its divisors is an integer number (1248076).

Almost surely, 2^6545623 is an apocalyptic number.

6545623 is a deficient number, since it is larger than the sum of its proper divisors (942833).

6545623 is an frugal number, since it uses more digits than its factorization.

6545623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1941 (or 974 counting only the distinct ones).

The product of its digits is 21600, while the sum is 31.

The square root of 6545623 is about 2558.4415177995. The cubic root of 6545623 is about 187.0611770440.

The spelling of 6545623 in words is "six million, five hundred forty-five thousand, six hundred twenty-three".