40008747385489 has 2 divisors, whose sum is σ = 40008747385490. Its totient is φ = 40008747385488.

The previous prime is 40008747385423. The next prime is 40008747385549. The reversal of 40008747385489 is 98458374780004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35865629619264 + 4143117766225 = 5988792^2 + 2035465^2 .

It is a cyclic number.

It is not a de Polignac number, because 40008747385489 - 2¹⁷ = 40008747254417 is a prime.

It is not a weakly prime, because it can be changed into another prime (40008747385289) 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, 20004373692744 + 20004373692745.

It is an arithmetic number, because the mean of its divisors is an integer number (20004373692745).

Almost surely, 2^{40008747385489} is an apocalyptic number.

It is an amenable number.

40008747385489 is a deficient number, since it is larger than the sum of its proper divisors (1).

40008747385489 is an equidigital number, since it uses as much as digits as its factorization.

40008747385489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216760320, while the sum is 67.

The spelling of 40008747385489 in words is "forty trillion, eight billion, seven hundred forty-seven million, three hundred eighty-five thousand, four hundred eighty-nine".