40821320723 has 2 divisors, whose sum is σ = 40821320724. Its totient is φ = 40821320722.

The previous prime is 40821320717. The next prime is 40821320767. The reversal of 40821320723 is 32702312804.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40821320723 - 2¹⁶ = 40821255187 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40821320723.

It is not a weakly prime, because it can be changed into another prime (40821320783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20410660361 + 20410660362.

It is an arithmetic number, because the mean of its divisors is an integer number (20410660362).

Almost surely, 2^40821320723 is an apocalyptic number.

40821320723 is a deficient number, since it is larger than the sum of its proper divisors (1).

40821320723 is an equidigital number, since it uses as much as digits as its factorization.

40821320723 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 32.

The spelling of 40821320723 in words is "forty billion, eight hundred twenty-one million, three hundred twenty thousand, seven hundred twenty-three".