40800773521 has 2 divisors, whose sum is σ = 40800773522. Its totient is φ = 40800773520.

The previous prime is 40800773509. The next prime is 40800773539. The reversal of 40800773521 is 12537700804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32412961296 + 8387812225 = 180036^2 + 91585^2 .

It is a cyclic number.

It is not a de Polignac number, because 40800773521 - 2⁹ = 40800773009 is a prime.

It is not a weakly prime, because it can be changed into another prime (40800773021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20400386760 + 20400386761.

It is an arithmetic number, because the mean of its divisors is an integer number (20400386761).

Almost surely, 2^40800773521 is an apocalyptic number.

It is an amenable number.

40800773521 is a deficient number, since it is larger than the sum of its proper divisors (1).

40800773521 is an equidigital number, since it uses as much as digits as its factorization.

40800773521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47040, while the sum is 37.

The spelling of 40800773521 in words is "forty billion, eight hundred million, seven hundred seventy-three thousand, five hundred twenty-one".