40164244680209 has 4 divisors (see below), whose sum is σ = 43253801963316. Its totient is φ = 37074687397104.

The previous prime is 40164244680169. The next prime is 40164244680223. The reversal of 40164244680209 is 90208644246104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5313817949584 + 34850426730625 = 2305172^2 + 5903425^2 .

It is a cyclic number.

It is not a de Polignac number, because 40164244680209 - 2³² = 40159949712913 is a prime.

It is a super-2 number, since 2×40164244680209² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40164244680409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1544778641534 + ... + 1544778641559.

It is an arithmetic number, because the mean of its divisors is an integer number (10813450490829).

Almost surely, 2^{40164244680209} is an apocalyptic number.

It is an amenable number.

40164244680209 is a deficient number, since it is larger than the sum of its proper divisors (3089557283107).

40164244680209 is a wasteful number, since it uses less digits than its factorization.

40164244680209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3089557283106.

The product of its (nonzero) digits is 2654208, while the sum is 50.

The spelling of 40164244680209 in words is "forty trillion, one hundred sixty-four billion, two hundred forty-four million, six hundred eighty thousand, two hundred nine".