4006640423065 has 16 divisors (see below), whose sum is σ = 5500735966080. Its totient is φ = 2744453168640.

The previous prime is 4006640423057. The next prime is 4006640423077. The reversal of 4006640423065 is 5603240466004.

It is not a de Polignac number, because 4006640423065 - 2³ = 4006640423057 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 61579671 + ... + 61644700.

It is an arithmetic number, because the mean of its divisors is an integer number (343795997880).

Almost surely, 2^{4006640423065} is an apocalyptic number.

It is an amenable number.

4006640423065 is a deficient number, since it is larger than the sum of its proper divisors (1494095543015).

4006640423065 is a wasteful number, since it uses less digits than its factorization.

4006640423065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123225312.

The product of its (nonzero) digits is 414720, while the sum is 40.

Adding to 4006640423065 its reverse (5603240466004), we get a palindrome (9609880889069).

The spelling of 4006640423065 in words is "four trillion, six billion, six hundred forty million, four hundred twenty-three thousand, sixty-five".