645051300 has 36 divisors (see below), whose sum is σ = 1866349296. Its totient is φ = 172013600.

The previous prime is 645051293. The next prime is 645051301. The reversal of 645051300 is 3150546.

645051300 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 (645051301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1074786 + ... + 1075385.

It is an arithmetic number, because the mean of its divisors is an integer number (51843036).

Almost surely, 2^645051300 is an apocalyptic number.

645051300 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

645051300 is an abundant number, since it is smaller than the sum of its proper divisors (1221297996).

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

645051300 is a wasteful number, since it uses less digits than its factorization.

645051300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2150188 (or 2150181 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 645051300 is about 25397.8601460832. The cubic root of 645051300 is about 864.0351655354.

The spelling of 645051300 in words is "six hundred forty-five million, fifty-one thousand, three hundred".