645822160671 has 16 divisors (see below), whose sum is σ = 951390192384. Its totient is φ = 387603410304.

The previous prime is 645822160651. The next prime is 645822160699. The reversal of 645822160671 is 176061228546.

It is not a de Polignac number, because 645822160671 - 2²⁶ = 645755051807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 645822160671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645822160631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 275285341 + ... + 275287686.

It is an arithmetic number, because the mean of its divisors is an integer number (59461887024).

Almost surely, 2^645822160671 is an apocalyptic number.

645822160671 is a deficient number, since it is larger than the sum of its proper divisors (305568031713).

645822160671 is a wasteful number, since it uses less digits than its factorization.

645822160671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550573070.

The product of its (nonzero) digits is 967680, while the sum is 48.

The spelling of 645822160671 in words is "six hundred forty-five billion, eight hundred twenty-two million, one hundred sixty thousand, six hundred seventy-one".