11500072909 has 16 divisors (see below), whose sum is σ = 13122717552. Its totient is φ = 9983766528.

The previous prime is 11500072907. The next prime is 11500072921. The reversal of 11500072909 is 90927000511.

It can be written as a sum of positive squares in 8 ways, for example, as 69255684 + 11430817225 = 8322^2 + 106915^2 .

It is not a de Polignac number, because 11500072909 - 2¹ = 11500072907 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11500072907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 298537 + ... + 334849.

It is an arithmetic number, because the mean of its divisors is an integer number (820169847).

Almost surely, 2^11500072909 is an apocalyptic number.

It is an amenable number.

11500072909 is a deficient number, since it is larger than the sum of its proper divisors (1622644643).

11500072909 is a wasteful number, since it uses less digits than its factorization.

11500072909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37776.

The product of its (nonzero) digits is 5670, while the sum is 34.

The spelling of 11500072909 in words is "eleven billion, five hundred million, seventy-two thousand, nine hundred nine".