645622301111 has 4 divisors (see below), whose sum is σ = 652014601224. Its totient is φ = 639230001000.

The previous prime is 645622301081. The next prime is 645622301131. The reversal of 645622301111 is 111103226546.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 645622301111 - 2⁶ = 645622301047 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 (645622301131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3196149905 + ... + 3196150106.

It is an arithmetic number, because the mean of its divisors is an integer number (163003650306).

Almost surely, 2^645622301111 is an apocalyptic number.

645622301111 is a deficient number, since it is larger than the sum of its proper divisors (6392300113).

645622301111 is a wasteful number, since it uses less digits than its factorization.

645622301111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6392300112.

The product of its (nonzero) digits is 8640, while the sum is 32.

Adding to 645622301111 its reverse (111103226546), we get a palindrome (756725527657).

The spelling of 645622301111 in words is "six hundred forty-five billion, six hundred twenty-two million, three hundred one thousand, one hundred eleven".