3789664645 has 16 divisors (see below), whose sum is σ = 5016865392. Its totient is φ = 2730263040.

The previous prime is 3789664609. The next prime is 3789664649. The reversal of 3789664645 is 5464669873.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1462374081 + 2327290564 = 38241^2 + 48242^2 .

It is not a de Polignac number, because 3789664645 - 2⁷ = 3789664517 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3789664645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3789664649) 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, 708342 + ... + 713671.

It is an arithmetic number, because the mean of its divisors is an integer number (313554087).

Almost surely, 2^3789664645 is an apocalyptic number.

It is an amenable number.

3789664645 is a deficient number, since it is larger than the sum of its proper divisors (1227200747).

3789664645 is a wasteful number, since it uses less digits than its factorization.

3789664645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1422072.

The product of its digits is 26127360, while the sum is 58.

The square root of 3789664645 is about 61560.2521518553. The cubic root of 3789664645 is about 1559.0747094772.

The spelling of 3789664645 in words is "three billion, seven hundred eighty-nine million, six hundred sixty-four thousand, six hundred forty-five".