625440565 has 8 divisors (see below), whose sum is σ = 750712248. Its totient is φ = 500230080.

The previous prime is 625440539. The next prime is 625440589. The reversal of 625440565 is 565044526.

It can be written as a sum of positive squares in 4 ways, for example, as 56761156 + 568679409 = 7534^2 + 23847^2 .

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

It is not a de Polignac number, because 625440565 - 2¹⁷ = 625309493 is a prime.

It is a Duffinian number.

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, 11439 + ... + 37171.

It is an arithmetic number, because the mean of its divisors is an integer number (93839031).

Almost surely, 2^625440565 is an apocalyptic number.

It is an amenable number.

625440565 is a deficient number, since it is larger than the sum of its proper divisors (125271683).

625440565 is a wasteful number, since it uses less digits than its factorization.

625440565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30599.

The product of its (nonzero) digits is 144000, while the sum is 37.

The square root of 625440565 is about 25008.8097477669. The cubic root of 625440565 is about 855.1888209671.

The spelling of 625440565 in words is "six hundred twenty-five million, four hundred forty thousand, five hundred sixty-five".