625000000 has 77 divisors (see below), whose sum is σ = 1550292937. Its totient is φ = 250000000.

The previous prime is 624999989. The next prime is 625000027. The reversal of 625000000 is 526.

The square root of 625000000 is 25000.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 5 ways, for example, as 3594816 + 621405184 = 1896^2 + 24928^2 .

It is a Duffinian 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 10 ways as a sum of consecutive naturals, for example, 124999998 + ... + 125000002.

Almost surely, 2^625000000 is an apocalyptic number.

625000000 is the 25000-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 625000000

625000000 is an abundant number, since it is smaller than the sum of its proper divisors (925292937).

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

625000000 is an frugal number, since it uses more digits than its factorization.

625000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62 (or 7 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 13.

The cubic root of 625000000 is about 854.9879733383.

Adding to 625000000 its reverse (526), we get a palindrome (625000526).

The spelling of 625000000 in words is "six hundred twenty-five million", and thus it is an aban number.