645066244143 has 12 divisors (see below), whose sum is σ = 972273759600. Its totient is φ = 411346590336.

The previous prime is 645066244117. The next prime is 645066244169. The reversal of 645066244143 is 341442660546.

645066244143 is a `hidden beast` number, since 6 + 4 + 5 + 0 + 6 + 624 + 4 + 14 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (645066244117) and next prime (645066244169).

It is not a de Polignac number, because 645066244143 - 2¹⁸ = 645065981999 is a prime.

It is a super-2 number, since 2×645066244143² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645066284143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1558130818 + ... + 1558131231.

It is an arithmetic number, because the mean of its divisors is an integer number (81022813300).

Almost surely, 2^645066244143 is an apocalyptic number.

645066244143 is a deficient number, since it is larger than the sum of its proper divisors (327207515457).

645066244143 is a wasteful number, since it uses less digits than its factorization.

645066244143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3116262078 (or 3116262075 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 45.

The spelling of 645066244143 in words is "six hundred forty-five billion, sixty-six million, two hundred forty-four thousand, one hundred forty-three".