645249050 has 24 divisors (see below), whose sum is σ = 1200831996. Its totient is φ = 257955840.

The previous prime is 645249049. The next prime is 645249067. The reversal of 645249050 is 50942546.

It is a happy number.

645249050 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 69872881 + 575376169 = 8359^2 + 23987^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 645249050.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 170984 + ... + 174716.

Almost surely, 2^645249050 is an apocalyptic number.

645249050 is a deficient number, since it is larger than the sum of its proper divisors (555582946).

645249050 is a wasteful number, since it uses less digits than its factorization.

645249050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7202 (or 7197 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 645249050 is about 25401.7528922710. The cubic root of 645249050 is about 864.1234507601.

The spelling of 645249050 in words is "six hundred forty-five million, two hundred forty-nine thousand, fifty".