10115909009 has 2 divisors, whose sum is σ = 10115909010. Its totient is φ = 10115909008.

The previous prime is 10115908993. The next prime is 10115909017. The reversal of 10115909009 is 90090951101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6565536784 + 3550372225 = 81028^2 + 59585^2 .

It is a cyclic number.

It is not a de Polignac number, because 10115909009 - 2⁴ = 10115908993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10115909009.

It is not a weakly prime, because it can be changed into another prime (10115909509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5057954504 + 5057954505.

It is an arithmetic number, because the mean of its divisors is an integer number (5057954505).

Almost surely, 2^10115909009 is an apocalyptic number.

It is an amenable number.

10115909009 is a deficient number, since it is larger than the sum of its proper divisors (1).

10115909009 is an equidigital number, since it uses as much as digits as its factorization.

10115909009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3645, while the sum is 35.

The spelling of 10115909009 in words is "ten billion, one hundred fifteen million, nine hundred nine thousand, nine".