11726173009 has 2 divisors, whose sum is σ = 11726173010. Its totient is φ = 11726173008.

The previous prime is 11726172959. The next prime is 11726173033. The reversal of 11726173009 is 90037162711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7435267984 + 4290905025 = 86228^2 + 65505^2 .

It is a cyclic number.

It is not a de Polignac number, because 11726173009 - 2¹¹ = 11726170961 is a prime.

It is a super-2 number, since 2×11726173009² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11726173049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5863086504 + 5863086505.

It is an arithmetic number, because the mean of its divisors is an integer number (5863086505).

Almost surely, 2^11726173009 is an apocalyptic number.

It is an amenable number.

11726173009 is a deficient number, since it is larger than the sum of its proper divisors (1).

11726173009 is an equidigital number, since it uses as much as digits as its factorization.

11726173009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15876, while the sum is 37.

The spelling of 11726173009 in words is "eleven billion, seven hundred twenty-six million, one hundred seventy-three thousand, nine".