645851030 has 16 divisors (see below), whose sum is σ = 1268216784. Its totient is φ = 234854880.

The previous prime is 645851027. The next prime is 645851033. The reversal of 645851030 is 30158546.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (645851027) and next prime (645851033).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645851033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2935577 + ... + 2935796.

It is an arithmetic number, because the mean of its divisors is an integer number (79263549).

Almost surely, 2^645851030 is an apocalyptic number.

645851030 is a deficient number, since it is larger than the sum of its proper divisors (622365754).

645851030 is a wasteful number, since it uses less digits than its factorization.

645851030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5871391.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 645851030 is about 25413.5993121793. The cubic root of 645851030 is about 864.3920929488.

The spelling of 645851030 in words is "six hundred forty-five million, eight hundred fifty-one thousand, thirty".