645339695 has 32 divisors (see below), whose sum is σ = 1039772160. Its totient is φ = 371341440.

The previous prime is 645339689. The next prime is 645339701. The reversal of 645339695 is 596933546.

It is an interprime number because it is at equal distance from previous prime (645339689) and next prime (645339701).

It is not a de Polignac number, because 645339695 - 2⁸ = 645339439 is a prime.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59465 + ... + 69474.

It is an arithmetic number, because the mean of its divisors is an integer number (32492880).

Almost surely, 2^645339695 is an apocalyptic number.

645339695 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

645339695 is a deficient number, since it is larger than the sum of its proper divisors (394432465).

645339695 is a wasteful number, since it uses less digits than its factorization.

645339695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128975.

The product of its digits is 2624400, while the sum is 50.

The square root of 645339695 is about 25403.5370568746. The cubic root of 645339695 is about 864.1639130708.

The spelling of 645339695 in words is "six hundred forty-five million, three hundred thirty-nine thousand, six hundred ninety-five".