645611422163 has 8 divisors (see below), whose sum is σ = 652050347760. Its totient is φ = 639180000000.

The previous prime is 645611422151. The next prime is 645611422171. The reversal of 645611422163 is 361224116546.

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 645611422163 - 2¹⁶ = 645611356627 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 645611422163.

It is not an unprimeable number, because it can be changed into a prime (645611422123) 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, 1702838 + ... + 2047163.

It is an arithmetic number, because the mean of its divisors is an integer number (81506293470).

Almost surely, 2^645611422163 is an apocalyptic number.

645611422163 is a deficient number, since it is larger than the sum of its proper divisors (6438925597).

645611422163 is a wasteful number, since it uses less digits than its factorization.

645611422163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3751717.

The product of its digits is 207360, while the sum is 41.

The spelling of 645611422163 in words is "six hundred forty-five billion, six hundred eleven million, four hundred twenty-two thousand, one hundred sixty-three".