3645811387 has 2 divisors, whose sum is σ = 3645811388. Its totient is φ = 3645811386.

The previous prime is 3645811363. The next prime is 3645811423. The reversal of 3645811387 is 7831185463.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3645811387 - 2¹⁹ = 3645287099 is a prime.

It is not a weakly prime, because it can be changed into another prime (3645811487) 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 as a sum of consecutive naturals, namely, 1822905693 + 1822905694.

It is an arithmetic number, because the mean of its divisors is an integer number (1822905694).

Almost surely, 2^3645811387 is an apocalyptic number.

3645811387 is a deficient number, since it is larger than the sum of its proper divisors (1).

3645811387 is an equidigital number, since it uses as much as digits as its factorization.

3645811387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 46.

The square root of 3645811387 is about 60380.5547092771. The cubic root of 3645811387 is about 1539.0925371379.

The spelling of 3645811387 in words is "three billion, six hundred forty-five million, eight hundred eleven thousand, three hundred eighty-seven".