18241172579249 has 4 divisors (see below), whose sum is σ = 18585345646836. Its totient is φ = 17896999511664.

The previous prime is 18241172579213. The next prime is 18241172579263. The reversal of 18241172579249 is 94297527114281.

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 12709118050225 + 5532054529024 = 3564985^2 + 2352032^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18241172579249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18241172579191 and 18241172579200.

It is not an unprimeable number, because it can be changed into a prime (18241172279249) 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, 172086533714 + ... + 172086533819.

It is an arithmetic number, because the mean of its divisors is an integer number (4646336411709).

Almost surely, 2^{18241172579249} is an apocalyptic number.

It is an amenable number.

18241172579249 is a deficient number, since it is larger than the sum of its proper divisors (344173067587).

18241172579249 is an equidigital number, since it uses as much as digits as its factorization.

18241172579249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344173067586.

The product of its digits is 20321280, while the sum is 62.

The spelling of 18241172579249 in words is "eighteen trillion, two hundred forty-one billion, one hundred seventy-two million, five hundred seventy-nine thousand, two hundred forty-nine".