41388909509 has 2 divisors, whose sum is σ = 41388909510. Its totient is φ = 41388909508.

The previous prime is 41388909491. The next prime is 41388909547. The reversal of 41388909509 is 90590988314.

41388909509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39846148225 + 1542761284 = 199615^2 + 39278^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-41388909509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41388909209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20694454754 + 20694454755.

It is an arithmetic number, because the mean of its divisors is an integer number (20694454755).

Almost surely, 2^41388909509 is an apocalyptic number.

It is an amenable number.

41388909509 is a deficient number, since it is larger than the sum of its proper divisors (1).

41388909509 is an equidigital number, since it uses as much as digits as its factorization.

41388909509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2799360, while the sum is 56.

The spelling of 41388909509 in words is "forty-one billion, three hundred eighty-eight million, nine hundred nine thousand, five hundred nine".