625640865 has 8 divisors (see below), whose sum is σ = 1001025408. Its totient is φ = 333675120.

The previous prime is 625640863. The next prime is 625640891. The reversal of 625640865 is 568046526.

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

It is not a de Polignac number, because 625640865 - 2¹ = 625640863 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (625640861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20854681 + ... + 20854710.

It is an arithmetic number, because the mean of its divisors is an integer number (125128176).

Almost surely, 2^625640865 is an apocalyptic number.

It is an amenable number.

625640865 is a deficient number, since it is larger than the sum of its proper divisors (375384543).

625640865 is a wasteful number, since it uses less digits than its factorization.

625640865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41709399.

The product of its (nonzero) digits is 345600, while the sum is 42.

The square root of 625640865 is about 25012.8140160199. The cubic root of 625640865 is about 855.2801038418.

The spelling of 625640865 in words is "six hundred twenty-five million, six hundred forty thousand, eight hundred sixty-five".