11000172497509 has 4 divisors (see below), whose sum is σ = 11846339612716. Its totient is φ = 10154005382304.

The previous prime is 11000172497477. The next prime is 11000172497549. The reversal of 11000172497509 is 90579427100011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4133178452484 + 6866994045025 = 2033022^2 + 2620495^2 .

It is a cyclic number.

It is not a de Polignac number, because 11000172497509 - 2⁵ = 11000172497477 is a prime.

It is a super-2 number, since 2×11000172497509² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11000172497549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423083557584 + ... + 423083557609.

It is an arithmetic number, because the mean of its divisors is an integer number (2961584903179).

Almost surely, 2^{11000172497509} is an apocalyptic number.

It is an amenable number.

11000172497509 is a deficient number, since it is larger than the sum of its proper divisors (846167115207).

11000172497509 is an equidigital number, since it uses as much as digits as its factorization.

11000172497509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846167115206.

The product of its (nonzero) digits is 158760, while the sum is 46.

The spelling of 11000172497509 in words is "eleven trillion, one hundred seventy-two million, four hundred ninety-seven thousand, five hundred nine".