645182805135 has 16 divisors (see below), whose sum is σ = 1126137260160. Its totient is φ = 312815905440.

The previous prime is 645182805133. The next prime is 645182805149. The reversal of 645182805135 is 531508281546.

It is not a de Polignac number, because 645182805135 - 2¹ = 645182805133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645182805131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1955099245 + ... + 1955099574.

It is an arithmetic number, because the mean of its divisors is an integer number (70383578760).

Almost surely, 2^645182805135 is an apocalyptic number.

645182805135 is a deficient number, since it is larger than the sum of its proper divisors (480954455025).

645182805135 is a wasteful number, since it uses less digits than its factorization.

645182805135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3910198838.

The product of its (nonzero) digits is 1152000, while the sum is 48.

The spelling of 645182805135 in words is "six hundred forty-five billion, one hundred eighty-two million, eight hundred five thousand, one hundred thirty-five".