645630105 has 8 divisors (see below), whose sum is σ = 1033008192. Its totient is φ = 344336048.

The previous prime is 645630101. The next prime is 645630109. The reversal of 645630105 is 501036546.

645630105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (645630101) and next prime (645630109).

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

It is a cyclic number.

It is not a de Polignac number, because 645630105 - 2² = 645630101 is a prime.

It is a super-2 number, since 2×645630105² = 833676464964622050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (645630101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21520989 + ... + 21521018.

It is an arithmetic number, because the mean of its divisors is an integer number (129126024).

Almost surely, 2^645630105 is an apocalyptic number.

It is an amenable number.

645630105 is a deficient number, since it is larger than the sum of its proper divisors (387378087).

645630105 is a wasteful number, since it uses less digits than its factorization.

645630105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43042015.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 645630105 is about 25409.2523502759. The cubic root of 645630105 is about 864.2935214037.

The spelling of 645630105 in words is "six hundred forty-five million, six hundred thirty thousand, one hundred five".