40664561800023 has 36 divisors (see below), whose sum is σ = 68499372775600. Its totient is φ = 23236689997584.

The previous prime is 40664561800021. The next prime is 40664561800073. The reversal of 40664561800023 is 32000816546604.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

40664561800023 is a `hidden beast` number, since 4 + 0 + 6 + 6 + 4 + 5 + 618 + 0 + 0 + 0 + 23 = 666.

It is not a de Polignac number, because 40664561800023 - 2¹ = 40664561800021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40664561800021) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 354246865 + ... + 354361637.

Almost surely, 2^{40664561800023} is an apocalyptic number.

40664561800023 is a deficient number, since it is larger than the sum of its proper divisors (27834810975577).

40664561800023 is an frugal number, since it uses more digits than its factorization.

40664561800023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229573 (or 114783 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 40664561800023 in words is "forty trillion, six hundred sixty-four billion, five hundred sixty-one million, eight hundred thousand, twenty-three".