625641140 has 96 divisors (see below), whose sum is σ = 1464783264. Its totient is φ = 223395840.

The previous prime is 625641131. The next prime is 625641151. The reversal of 625641140 is 41146526.

It can be written as a sum of positive squares in 16 ways, for example, as 236052496 + 389588644 = 15364^2 + 19738^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 515174 + ... + 516386.

It is an arithmetic number, because the mean of its divisors is an integer number (15258159).

Almost surely, 2^625641140 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 625641140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (732391632).

625641140 is an abundant number, since it is smaller than the sum of its proper divisors (839142124).

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

625641140 is a wasteful number, since it uses less digits than its factorization.

625641140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1317 (or 1315 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 625641140 is about 25012.8195132016. The cubic root of 625641140 is about 855.2802291544.

Adding to 625641140 its reverse (41146526), we get a palindrome (666787666).

The spelling of 625641140 in words is "six hundred twenty-five million, six hundred forty-one thousand, one hundred forty".