127777746553 has 4 divisors (see below), whose sum is σ = 127788342388. Its totient is φ = 127767150720.

The previous prime is 127777746511. The next prime is 127777746557. The reversal of 127777746553 is 355647777721.

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

It can be written as a sum of positive squares in 2 ways, for example, as 57990900969 + 69786845584 = 240813^2 + 264172^2 .

It is a cyclic number.

It is not a de Polignac number, because 127777746553 - 2³³ = 119187811961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 127777746491 and 127777746500.

It is not an unprimeable number, because it can be changed into a prime (127777746557) 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, 5279808 + ... + 5303953.

It is an arithmetic number, because the mean of its divisors is an integer number (31947085597).

Almost surely, 2^127777746553 is an apocalyptic number.

It is an amenable number.

127777746553 is a deficient number, since it is larger than the sum of its proper divisors (10595835).

127777746553 is a wasteful number, since it uses less digits than its factorization.

127777746553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10595834.

The product of its digits is 60505200, while the sum is 61.

The spelling of 127777746553 in words is "one hundred twenty-seven billion, seven hundred seventy-seven million, seven hundred forty-six thousand, five hundred fifty-three".