10438557509 has 2 divisors, whose sum is σ = 10438557510. Its totient is φ = 10438557508.

The previous prime is 10438557469. The next prime is 10438557539. The reversal of 10438557509 is 90575583401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9706584484 + 731973025 = 98522^2 + 27055^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10438557509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10438557539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5219278754 + 5219278755.

It is an arithmetic number, because the mean of its divisors is an integer number (5219278755).

Almost surely, 2^10438557509 is an apocalyptic number.

It is an amenable number.

10438557509 is a deficient number, since it is larger than the sum of its proper divisors (1).

10438557509 is an equidigital number, since it uses as much as digits as its factorization.

10438557509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756000, while the sum is 47.

The spelling of 10438557509 in words is "ten billion, four hundred thirty-eight million, five hundred fifty-seven thousand, five hundred nine".