3664591645 has 32 divisors (see below), whose sum is σ = 5276275200. Its totient is φ = 2407779840.

The previous prime is 3664591639. The next prime is 3664591673. The reversal of 3664591645 is 5461954663.

It is not a de Polignac number, because 3664591645 - 2¹¹ = 3664589597 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 20920 + ... + 88129.

It is an arithmetic number, because the mean of its divisors is an integer number (164883600).

Almost surely, 2^3664591645 is an apocalyptic number.

It is an amenable number.

3664591645 is a deficient number, since it is larger than the sum of its proper divisors (1611683555).

3664591645 is a wasteful number, since it uses less digits than its factorization.

3664591645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109125.

The product of its digits is 2332800, while the sum is 49.

The square root of 3664591645 is about 60535.8707296756. The cubic root of 3664591645 is about 1541.7307304406.

The spelling of 3664591645 in words is "three billion, six hundred sixty-four million, five hundred ninety-one thousand, six hundred forty-five".