127647774557 has 16 divisors (see below), whose sum is σ = 139606290432. Its totient is φ = 116188680960.

The previous prime is 127647774547. The next prime is 127647774601. The reversal of 127647774557 is 755477746721.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 127647774557 - 2⁶ = 127647774493 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 127647774557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127647774547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 748523 + ... + 903095.

It is an arithmetic number, because the mean of its divisors is an integer number (8725393152).

Almost surely, 2^127647774557 is an apocalyptic number.

127647774557 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

127647774557 is a deficient number, since it is larger than the sum of its proper divisors (11958515875).

127647774557 is a wasteful number, since it uses less digits than its factorization.

127647774557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156188.

The product of its digits is 80673600, while the sum is 62.

The spelling of 127647774557 in words is "one hundred twenty-seven billion, six hundred forty-seven million, seven hundred seventy-four thousand, five hundred fifty-seven".