3645129771 has 12 divisors (see below), whose sum is σ = 5287220640. Its totient is φ = 2419917360.

The previous prime is 3645129751. The next prime is 3645129773. The reversal of 3645129771 is 1779215463.

3645129771 is a `hidden beast` number, since 3 + 64 + 512 + 9 + 7 + 71 = 666.

It is not a de Polignac number, because 3645129771 - 2¹⁷ = 3644998699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3645129773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 845160 + ... + 849461.

It is an arithmetic number, because the mean of its divisors is an integer number (440601720).

Almost surely, 2^3645129771 is an apocalyptic number.

3645129771 is a deficient number, since it is larger than the sum of its proper divisors (1642090869).

3645129771 is a wasteful number, since it uses less digits than its factorization.

3645129771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1694866 (or 1694863 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 3645129771 is about 60374.9101117343. The cubic root of 3645129771 is about 1538.9966156020.

The spelling of 3645129771 in words is "three billion, six hundred forty-five million, one hundred twenty-nine thousand, seven hundred seventy-one".