11798172605 has 8 divisors (see below), whose sum is σ = 14158717272. Its totient is φ = 9437931328.

The previous prime is 11798172599. The next prime is 11798172649. The reversal of 11798172605 is 50627189711.

It can be written as a sum of positive squares in 4 ways, for example, as 420537049 + 11377635556 = 20507^2 + 106666^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11798172605 - 2²⁰ = 11797124029 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11798172605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20939 + ... + 155031.

It is an arithmetic number, because the mean of its divisors is an integer number (1769839659).

Almost surely, 2^11798172605 is an apocalyptic number.

It is an amenable number.

11798172605 is a deficient number, since it is larger than the sum of its proper divisors (2360544667).

11798172605 is a wasteful number, since it uses less digits than its factorization.

11798172605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151695.

The product of its (nonzero) digits is 211680, while the sum is 47.

The spelling of 11798172605 in words is "eleven billion, seven hundred ninety-eight million, one hundred seventy-two thousand, six hundred five".