4031664645 has 32 divisors (see below), whose sum is σ = 6485368320. Its totient is φ = 2138688000.

The previous prime is 4031664617. The next prime is 4031664647. The reversal of 4031664645 is 5464661304.

It is not a de Polignac number, because 4031664645 - 2⁸ = 4031664389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4031664647) 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 31 ways as a sum of consecutive naturals, for example, 3570441 + ... + 3571569.

It is an arithmetic number, because the mean of its divisors is an integer number (202667760).

Almost surely, 2^4031664645 is an apocalyptic number.

It is an amenable number.

4031664645 is a deficient number, since it is larger than the sum of its proper divisors (2453703675).

4031664645 is a wasteful number, since it uses less digits than its factorization.

4031664645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2205.

The product of its (nonzero) digits is 207360, while the sum is 39.

The square root of 4031664645 is about 63495.3907382260. The cubic root of 4031664645 is about 1591.5787550591.

The spelling of 4031664645 in words is "four billion, thirty-one million, six hundred sixty-four thousand, six hundred forty-five".