127771321417 has 4 divisors (see below), whose sum is σ = 127773818640. Its totient is φ = 127768824196.

The previous prime is 127771321387. The next prime is 127771321427. The reversal of 127771321417 is 714123177721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 127771321417 - 2²³ = 127762932809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127771321427) 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, 1170223 + ... + 1274740.

It is an arithmetic number, because the mean of its divisors is an integer number (31943454660).

Almost surely, 2^127771321417 is an apocalyptic number.

It is an amenable number.

127771321417 is a deficient number, since it is larger than the sum of its proper divisors (2497223).

127771321417 is an equidigital number, since it uses as much as digits as its factorization.

127771321417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2497222.

The product of its digits is 115248, while the sum is 43.

The spelling of 127771321417 in words is "one hundred twenty-seven billion, seven hundred seventy-one million, three hundred twenty-one thousand, four hundred seventeen".