645430117 has 8 divisors (see below), whose sum is σ = 677529216. Its totient is φ = 613667472.

The previous prime is 645430103. The next prime is 645430139. The reversal of 645430117 is 711034546.

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 645430117 - 2⁷ = 645429989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645430147) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 80178 + ... + 87859.

It is an arithmetic number, because the mean of its divisors is an integer number (84691152).

Almost surely, 2^645430117 is an apocalyptic number.

It is an amenable number.

645430117 is a deficient number, since it is larger than the sum of its proper divisors (32099099).

645430117 is a wasteful number, since it uses less digits than its factorization.

645430117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168227.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 645430117 is about 25405.3167073351. The cubic root of 645430117 is about 864.2042720635.

The spelling of 645430117 in words is "six hundred forty-five million, four hundred thirty thousand, one hundred seventeen".