4444665631 has 32 divisors (see below), whose sum is σ = 5363291648. Its totient is φ = 3604487040.

The previous prime is 4444665629. The next prime is 4444665647. The reversal of 4444665631 is 1365664444.

It is not a de Polignac number, because 4444665631 - 2¹ = 4444665629 is a prime.

It is a super-2 number, since 2×4444665631² = 39510105142785256322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4444665601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1228381 + ... + 1231993.

It is an arithmetic number, because the mean of its divisors is an integer number (167602864).

Almost surely, 2^4444665631 is an apocalyptic number.

4444665631 is a deficient number, since it is larger than the sum of its proper divisors (918626017).

4444665631 is a wasteful number, since it uses less digits than its factorization.

4444665631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3791.

The product of its digits is 829440, while the sum is 43.

The square root of 4444665631 is about 66668.3255451942. The cubic root of 4444665631 is about 1644.1686570822.

The spelling of 4444665631 in words is "four billion, four hundred forty-four million, six hundred sixty-five thousand, six hundred thirty-one".