13617479709231 has 4 divisors (see below), whose sum is σ = 18156639612312. Its totient is φ = 9078319806152.

The previous prime is 13617479709227. The next prime is 13617479709241. The reversal of 13617479709231 is 13290797471631.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 13617479709231 - 2² = 13617479709227 is a prime.

It is a super-2 number, since 2×13617479709231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13617479709221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2269579951536 + ... + 2269579951541.

It is an arithmetic number, because the mean of its divisors is an integer number (4539159903078).

Almost surely, 2^{13617479709231} is an apocalyptic number.

13617479709231 is a deficient number, since it is larger than the sum of its proper divisors (4539159903081).

13617479709231 is an equidigital number, since it uses as much as digits as its factorization.

13617479709231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4539159903080.

The product of its (nonzero) digits is 12002256, while the sum is 60.

The spelling of 13617479709231 in words is "thirteen trillion, six hundred seventeen billion, four hundred seventy-nine million, seven hundred nine thousand, two hundred thirty-one".