4001664815809 has 8 divisors (see below), whose sum is σ = 4058061104448. Its totient is φ = 3945269494320.

The previous prime is 4001664815803. The next prime is 4001664815839. The reversal of 4001664815809 is 9085184661004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4001664815809 - 2³ = 4001664815801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4001664815801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13780614 + ... + 14068000.

It is an arithmetic number, because the mean of its divisors is an integer number (507257638056).

Almost surely, 2^{4001664815809} is an apocalyptic number.

It is an amenable number.

4001664815809 is a deficient number, since it is larger than the sum of its proper divisors (56396288639).

4001664815809 is a wasteful number, since it uses less digits than its factorization.

4001664815809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483575.

The product of its (nonzero) digits is 1658880, while the sum is 52.

The spelling of 4001664815809 in words is "four trillion, one billion, six hundred sixty-four million, eight hundred fifteen thousand, eight hundred nine".