645170710111 has 8 divisors (see below), whose sum is σ = 648978075648. Its totient is φ = 641367819000.

The previous prime is 645170710087. The next prime is 645170710123. The reversal of 645170710111 is 111017071546.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-645170710111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645170710711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 829155 + ... + 1406356.

It is an arithmetic number, because the mean of its divisors is an integer number (81122259456).

Almost surely, 2^645170710111 is an apocalyptic number.

645170710111 is a deficient number, since it is larger than the sum of its proper divisors (3807365537).

645170710111 is a wasteful number, since it uses less digits than its factorization.

645170710111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2237213.

The product of its (nonzero) digits is 5880, while the sum is 34.

Adding to 645170710111 its reverse (111017071546), we get a palindrome (756187781657).

The spelling of 645170710111 in words is "six hundred forty-five billion, one hundred seventy million, seven hundred ten thousand, one hundred eleven".