625523438506 has 8 divisors (see below), whose sum is σ = 938322798660. Its totient is φ = 312749172288.

The previous prime is 625523438483. The next prime is 625523438513. The reversal of 625523438506 is 605834325526.

It can be written as a sum of positive squares in 2 ways, for example, as 537853558225 + 87669880281 = 733385^2 + 296091^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 625523438506.

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 3 ways as a sum of consecutive naturals, for example, 6211041 + ... + 6310948.

Almost surely, 2^625523438506 is an apocalyptic number.

625523438506 is a deficient number, since it is larger than the sum of its proper divisors (312799360154).

625523438506 is a wasteful number, since it uses less digits than its factorization.

625523438506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12546968.

The product of its (nonzero) digits is 5184000, while the sum is 49.

The spelling of 625523438506 in words is "six hundred twenty-five billion, five hundred twenty-three million, four hundred thirty-eight thousand, five hundred six".