127777421447 has 16 divisors (see below), whose sum is σ = 140070701568. Its totient is φ = 115841940480.

The previous prime is 127777421423. The next prime is 127777421459. The reversal of 127777421447 is 744124777721.

It is a cyclic number.

It is not a de Polignac number, because 127777421447 - 2¹⁶ = 127777355911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127777421407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 413978 + ... + 653400.

It is an arithmetic number, because the mean of its divisors is an integer number (8754418848).

Almost surely, 2^127777421447 is an apocalyptic number.

127777421447 is a deficient number, since it is larger than the sum of its proper divisors (12293280121).

127777421447 is a wasteful number, since it uses less digits than its factorization.

127777421447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240170.

The product of its digits is 4302592, while the sum is 53.

The spelling of 127777421447 in words is "one hundred twenty-seven billion, seven hundred seventy-seven million, four hundred twenty-one thousand, four hundred forty-seven".