625640000 has 70 divisors (see below), whose sum is σ = 1551483054. Its totient is φ = 250240000.

The previous prime is 625639979. The next prime is 625640017. The reversal of 625640000 is 46526.

It can be written as a sum of positive squares in 5 ways, for example, as 60341824 + 565298176 = 7768^2 + 23776^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 32180 + ... + 47820.

Almost surely, 2^625640000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 625640000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (775741527).

625640000 is an abundant number, since it is smaller than the sum of its proper divisors (925843054).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

625640000 is an equidigital number, since it uses as much as digits as its factorization.

625640000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15673 (or 15648 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 625640000 is about 25012.7967248766. The cubic root of 625640000 is about 855.2797096766.

Adding to 625640000 its reverse (46526), we get a palindrome (625686526).

It can be divided in two parts, 625 and 640000, that multiplied together give a square (400000000 = 20000²).

The spelling of 625640000 in words is "six hundred twenty-five million, six hundred forty thousand".