645332710126 has 24 divisors (see below), whose sum is σ = 1071396675720. Its totient is φ = 289795961952.

The previous prime is 645332710079. The next prime is 645332710129. The reversal of 645332710126 is 621017233546.

It is a happy number.

645332710126 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645332710129) 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, 9029596 + ... + 9100783.

It is an arithmetic number, because the mean of its divisors is an integer number (44641528155).

Almost surely, 2^645332710126 is an apocalyptic number.

645332710126 is a deficient number, since it is larger than the sum of its proper divisors (426063965594).

645332710126 is a wasteful number, since it uses less digits than its factorization.

645332710126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18130468 (or 18130431 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 40.

The spelling of 645332710126 in words is "six hundred forty-five billion, three hundred thirty-two million, seven hundred ten thousand, one hundred twenty-six".