645164195 has 16 divisors (see below), whose sum is σ = 882796320. Its totient is φ = 448402944.

The previous prime is 645164167. The next prime is 645164203. The reversal of 645164195 is 591461546.

645164195 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 645164195 - 2¹² = 645160099 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 290825 + ... + 293034.

It is an arithmetic number, because the mean of its divisors is an integer number (55174770).

Almost surely, 2^645164195 is an apocalyptic number.

645164195 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

645164195 is a deficient number, since it is larger than the sum of its proper divisors (237632125).

645164195 is a wasteful number, since it uses less digits than its factorization.

645164195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583894.

The product of its digits is 129600, while the sum is 41.

The square root of 645164195 is about 25400.0825786059. The cubic root of 645164195 is about 864.0855695678.

The spelling of 645164195 in words is "six hundred forty-five million, one hundred sixty-four thousand, one hundred ninety-five".