40800773021 has 2 divisors, whose sum is σ = 40800773022. Its totient is φ = 40800773020.

The previous prime is 40800773009. The next prime is 40800773059. The reversal of 40800773021 is 12037700804.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38313756121 + 2487016900 = 195739^2 + 49870^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40800773021 is a prime.

It is a super-2 number, since 2×40800773021² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40800773521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20400386510 + 20400386511.

It is an arithmetic number, because the mean of its divisors is an integer number (20400386511).

Almost surely, 2^40800773021 is an apocalyptic number.

It is an amenable number.

40800773021 is a deficient number, since it is larger than the sum of its proper divisors (1).

40800773021 is an equidigital number, since it uses as much as digits as its factorization.

40800773021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 32.

The spelling of 40800773021 in words is "forty billion, eight hundred million, seven hundred seventy-three thousand, twenty-one".