645827610 has 32 divisors (see below), whose sum is σ = 1567408320. Its totient is φ = 170284928.

The previous prime is 645827597. The next prime is 645827617. The reversal of 645827610 is 16728546.

645827610 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (645827617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118272 + ... + 123611.

It is an arithmetic number, because the mean of its divisors is an integer number (48981510).

Almost surely, 2^645827610 is an apocalyptic number.

645827610 is an abundant number, since it is smaller than the sum of its proper divisors (921580710).

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

645827610 is a wasteful number, since it uses less digits than its factorization.

645827610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241982.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 645827610 is about 25413.1385310827. The cubic root of 645827610 is about 864.3816445603.

The spelling of 645827610 in words is "six hundred forty-five million, eight hundred twenty-seven thousand, six hundred ten".