625131565 has 24 divisors (see below), whose sum is σ = 799899552. Its totient is φ = 468906240.

The previous prime is 625131553. The next prime is 625131571. The reversal of 625131565 is 565131526.

It is not a de Polignac number, because 625131565 - 2²¹ = 623034413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 625131565.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 477642 + ... + 478948.

It is an arithmetic number, because the mean of its divisors is an integer number (33329148).

Almost surely, 2^625131565 is an apocalyptic number.

It is an amenable number.

625131565 is a deficient number, since it is larger than the sum of its proper divisors (174767987).

625131565 is a wasteful number, since it uses less digits than its factorization.

625131565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1677 (or 1660 counting only the distinct ones).

The product of its digits is 27000, while the sum is 34.

The square root of 625131565 is about 25002.6311615398. The cubic root of 625131565 is about 855.0479619254.

The spelling of 625131565 in words is "six hundred twenty-five million, one hundred thirty-one thousand, five hundred sixty-five".