40001368129 has 2 divisors, whose sum is σ = 40001368130. Its totient is φ = 40001368128.

The previous prime is 40001368117. The next prime is 40001368139. The reversal of 40001368129 is 92186310004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32987640625 + 7013727504 = 181625^2 + 83748^2 .

It is a cyclic number.

It is not a de Polignac number, because 40001368129 - 2¹¹ = 40001366081 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40001368094 and 40001368103.

It is not a weakly prime, because it can be changed into another prime (40001368139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20000684064 + 20000684065.

It is an arithmetic number, because the mean of its divisors is an integer number (20000684065).

Almost surely, 2^40001368129 is an apocalyptic number.

It is an amenable number.

40001368129 is a deficient number, since it is larger than the sum of its proper divisors (1).

40001368129 is an equidigital number, since it uses as much as digits as its factorization.

40001368129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The spelling of 40001368129 in words is "forty billion, one million, three hundred sixty-eight thousand, one hundred twenty-nine".