12171441457 has 8 divisors (see below), whose sum is σ = 13917505536. Its totient is φ = 10427199072.

The previous prime is 12171441437. The next prime is 12171441481. The reversal of 12171441457 is 75414417121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12171441457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12171441437) 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 7 ways as a sum of consecutive naturals, for example, 441073 + ... + 467854.

It is an arithmetic number, because the mean of its divisors is an integer number (1739688192).

Almost surely, 2^12171441457 is an apocalyptic number.

It is an amenable number.

12171441457 is a deficient number, since it is larger than the sum of its proper divisors (1746064079).

12171441457 is an equidigital number, since it uses as much as digits as its factorization.

12171441457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910847.

The product of its digits is 31360, while the sum is 37.

Adding to 12171441457 its reverse (75414417121), we get a palindrome (87585858578).

It can be divided in two parts, 12171 and 441457, that added together give a triangular number (453628 = T₉₅₂).

The spelling of 12171441457 in words is "twelve billion, one hundred seventy-one million, four hundred forty-one thousand, four hundred fifty-seven".