41178916721 has 2 divisors, whose sum is σ = 41178916722. Its totient is φ = 41178916720.

The previous prime is 41178916711. The next prime is 41178916777. The reversal of 41178916721 is 12761987114.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22530010000 + 18648906721 = 150100^2 + 136561^2 .

It is a cyclic number.

It is not a de Polignac number, because 41178916721 - 2²⁶ = 41111807857 is a prime.

It is not a weakly prime, because it can be changed into another prime (41178916711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20589458360 + 20589458361.

It is an arithmetic number, because the mean of its divisors is an integer number (20589458361).

Almost surely, 2^41178916721 is an apocalyptic number.

It is an amenable number.

41178916721 is a deficient number, since it is larger than the sum of its proper divisors (1).

41178916721 is an equidigital number, since it uses as much as digits as its factorization.

41178916721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 47.

The spelling of 41178916721 in words is "forty-one billion, one hundred seventy-eight million, nine hundred sixteen thousand, seven hundred twenty-one".