10509528409 has 2 divisors, whose sum is σ = 10509528410. Its totient is φ = 10509528408.

The previous prime is 10509528331. The next prime is 10509528413. The reversal of 10509528409 is 90482590501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9014932809 + 1494595600 = 94947^2 + 38660^2 .

It is an emirp because it is prime and its reverse (90482590501) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10509528409 is a prime.

It is a super-2 number, since 2×10509528409² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10509568409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5254764204 + 5254764205.

It is an arithmetic number, because the mean of its divisors is an integer number (5254764205).

Almost surely, 2^10509528409 is an apocalyptic number.

It is an amenable number.

10509528409 is a deficient number, since it is larger than the sum of its proper divisors (1).

10509528409 is an equidigital number, since it uses as much as digits as its factorization.

10509528409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 43.

The spelling of 10509528409 in words is "ten billion, five hundred nine million, five hundred twenty-eight thousand, four hundred nine".