40633556621309 has 2 divisors, whose sum is σ = 40633556621310. Its totient is φ = 40633556621308.

The previous prime is 40633556621299. The next prime is 40633556621327. The reversal of 40633556621309 is 90312665533604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24161501239225 + 16472055382084 = 4915435^2 + 4058578^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40633556621309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40633556627309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20316778310654 + 20316778310655.

It is an arithmetic number, because the mean of its divisors is an integer number (20316778310655).

Almost surely, 2^{40633556621309} is an apocalyptic number.

It is an amenable number.

40633556621309 is a deficient number, since it is larger than the sum of its proper divisors (1).

40633556621309 is an equidigital number, since it uses as much as digits as its factorization.

40633556621309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10497600, while the sum is 53.

The spelling of 40633556621309 in words is "forty trillion, six hundred thirty-three billion, five hundred fifty-six million, six hundred twenty-one thousand, three hundred nine".