4006644171605 has 16 divisors (see below), whose sum is σ = 4810063143600. Its totient is φ = 3203922247680.

The previous prime is 4006644171599. The next prime is 4006644171617. The reversal of 4006644171605 is 5061714466004.

It can be written as a sum of positive squares in 8 ways, for example, as 261114868036 + 3745529303569 = 510994^2 + 1935337^2 .

It is not a de Polignac number, because 4006644171605 - 2³⁰ = 4005570429781 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126102161 + ... + 126133929.

It is an arithmetic number, because the mean of its divisors is an integer number (300628946475).

Almost surely, 2^{4006644171605} is an apocalyptic number.

It is an amenable number.

4006644171605 is a deficient number, since it is larger than the sum of its proper divisors (803418971995).

4006644171605 is a wasteful number, since it uses less digits than its factorization.

4006644171605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41944.

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 4006644171605 in words is "four trillion, six billion, six hundred forty-four million, one hundred seventy-one thousand, six hundred five".