40771036721 has 2 divisors, whose sum is σ = 40771036722. Its totient is φ = 40771036720.

The previous prime is 40771036699. The next prime is 40771036727. The reversal of 40771036721 is 12763017704.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40314616225 + 456420496 = 200785^2 + 21364^2 .

It is a cyclic number.

It is not a de Polignac number, because 40771036721 - 2²⁶ = 40703927857 is a prime.

It is not a weakly prime, because it can be changed into another prime (40771036727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20385518360 + 20385518361.

It is an arithmetic number, because the mean of its divisors is an integer number (20385518361).

Almost surely, 2^40771036721 is an apocalyptic number.

It is an amenable number.

40771036721 is a deficient number, since it is larger than the sum of its proper divisors (1).

40771036721 is an equidigital number, since it uses as much as digits as its factorization.

40771036721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49392, while the sum is 38.

The spelling of 40771036721 in words is "forty billion, seven hundred seventy-one million, thirty-six thousand, seven hundred twenty-one".