40020564161723 has 2 divisors, whose sum is σ = 40020564161724. Its totient is φ = 40020564161722.

The previous prime is 40020564161713. The next prime is 40020564161761. The reversal of 40020564161723 is 32716146502004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40020564161723 - 2¹⁴ = 40020564145339 is a prime.

It is not a weakly prime, because it can be changed into another prime (40020564161713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20010282080861 + 20010282080862.

It is an arithmetic number, because the mean of its divisors is an integer number (20010282080862).

Almost surely, 2^{40020564161723} is an apocalyptic number.

40020564161723 is a deficient number, since it is larger than the sum of its proper divisors (1).

40020564161723 is an equidigital number, since it uses as much as digits as its factorization.

40020564161723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 40020564161723 in words is "forty trillion, twenty billion, five hundred sixty-four million, one hundred sixty-one thousand, seven hundred twenty-three".