10500500009 has 2 divisors, whose sum is σ = 10500500010. Its totient is φ = 10500500008.

The previous prime is 10500499993. The next prime is 10500500039. The reversal of 10500500009 is 90000500501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8888718400 + 1611781609 = 94280^2 + 40147^2 .

It is a cyclic number.

It is not a de Polignac number, because 10500500009 - 2⁴ = 10500499993 is a prime.

It is a super-2 number, since 2×10500500009² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (10500500039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5250250004 + 5250250005.

It is an arithmetic number, because the mean of its divisors is an integer number (5250250005).

Almost surely, 2^10500500009 is an apocalyptic number.

It is an amenable number.

10500500009 is a deficient number, since it is larger than the sum of its proper divisors (1).

10500500009 is an equidigital number, since it uses as much as digits as its factorization.

10500500009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225, while the sum is 20.

The spelling of 10500500009 in words is "ten billion, five hundred million, five hundred thousand, nine".