127645313273 has 4 divisors (see below), whose sum is σ = 127768168320. Its totient is φ = 127522458228.

The previous prime is 127645313189. The next prime is 127645313291. The reversal of 127645313273 is 372313546721.

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, and also an emirpimes, since its reverse is a distinct semiprime: 372313546721 = 281 ⋅1324959241.

It is a cyclic number.

It is not a de Polignac number, because 127645313273 - 2³² = 123350345977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127645313293) 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, 61425965 + ... + 61428042.

It is an arithmetic number, because the mean of its divisors is an integer number (31942042080).

Almost surely, 2^127645313273 is an apocalyptic number.

It is an amenable number.

127645313273 is a deficient number, since it is larger than the sum of its proper divisors (122855047).

127645313273 is a wasteful number, since it uses less digits than its factorization.

127645313273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122855046.

The product of its digits is 635040, while the sum is 44.

Adding to 127645313273 its reverse (372313546721), we get a palindrome (499958859994).

The spelling of 127645313273 in words is "one hundred twenty-seven billion, six hundred forty-five million, three hundred thirteen thousand, two hundred seventy-three".