645222351111 has 8 divisors (see below), whose sum is σ = 926473119600. Its totient is φ = 397059908352.

The previous prime is 645222351101. The next prime is 645222351121. The reversal of 645222351111 is 111153222546.

645222351111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (645222351101) and next prime (645222351121).

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

It is not a de Polignac number, because 645222351111 - 2⁵ = 645222351079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645222351101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8272081386 + ... + 8272081463.

It is an arithmetic number, because the mean of its divisors is an integer number (115809139950).

Almost surely, 2^645222351111 is an apocalyptic number.

645222351111 is a deficient number, since it is larger than the sum of its proper divisors (281250768489).

645222351111 is a wasteful number, since it uses less digits than its factorization.

645222351111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16544162865.

The product of its digits is 14400, while the sum is 33.

Adding to 645222351111 its reverse (111153222546), we get a palindrome (756375573657).

The spelling of 645222351111 in words is "six hundred forty-five billion, two hundred twenty-two million, three hundred fifty-one thousand, one hundred eleven".