645195106 has 8 divisors (see below), whose sum is σ = 991397484. Its totient is φ = 314729280.

The previous prime is 645195077. The next prime is 645195107. The reversal of 645195106 is 601591546.

645195106 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 2 ways, for example, as 581051025 + 64144081 = 24105^2 + 8009^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (645195107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3934035 + ... + 3934198.

Almost surely, 2^645195106 is an apocalyptic number.

645195106 is a deficient number, since it is larger than the sum of its proper divisors (346202378).

645195106 is a wasteful number, since it uses less digits than its factorization.

645195106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7868276.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 645195106 is about 25400.6910535914. The cubic root of 645195106 is about 864.0993693223.

The spelling of 645195106 in words is "six hundred forty-five million, one hundred ninety-five thousand, one hundred six".