625516643 has 8 divisors (see below), whose sum is σ = 637326960. Its totient is φ = 613746720.

The previous prime is 625516637. The next prime is 625516673. The reversal of 625516643 is 346615526.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 625516643 - 2¹⁴ = 625500259 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 625516597 and 625516606.

It is not an unprimeable number, because it can be changed into a prime (625516673) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 22121 + ... + 41717.

It is an arithmetic number, because the mean of its divisors is an integer number (79665870).

Almost surely, 2^625516643 is an apocalyptic number.

625516643 is a deficient number, since it is larger than the sum of its proper divisors (11810317).

625516643 is a wasteful number, since it uses less digits than its factorization.

625516643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20197.

The product of its digits is 129600, while the sum is 38.

The square root of 625516643 is about 25010.3307255222. The cubic root of 625516643 is about 855.2234943483.

The spelling of 625516643 in words is "six hundred twenty-five million, five hundred sixteen thousand, six hundred forty-three".