625553565 has 64 divisors (see below), whose sum is σ = 1243662336. Its totient is φ = 261441792.

The previous prime is 625553543. The next prime is 625553569. The reversal of 625553565 is 565355526.

It is not a de Polignac number, because 625553565 - 2⁹ = 625553053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625553569) 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 63 ways as a sum of consecutive naturals, for example, 143914 + ... + 148196.

It is an arithmetic number, because the mean of its divisors is an integer number (19432224).

Almost surely, 2^625553565 is an apocalyptic number.

625553565 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

625553565 is a deficient number, since it is larger than the sum of its proper divisors (618108771).

625553565 is a wasteful number, since it uses less digits than its factorization.

625553565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4418.

The product of its digits is 675000, while the sum is 42.

The square root of 625553565 is about 25011.0688496114. The cubic root of 625553565 is about 855.2403209406.

The spelling of 625553565 in words is "six hundred twenty-five million, five hundred fifty-three thousand, five hundred sixty-five".