127787905041 has 4 divisors (see below), whose sum is σ = 170383873392. Its totient is φ = 85191936692.

The previous prime is 127787905039. The next prime is 127787905061. The reversal of 127787905041 is 140509787721.

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: 140509787721 = 3 ⋅46836595907.

It is a cyclic number.

It is not a de Polignac number, because 127787905041 - 2¹ = 127787905039 is a prime.

It is not an unprimeable number, because it can be changed into a prime (127787905001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21297984171 + ... + 21297984176.

It is an arithmetic number, because the mean of its divisors is an integer number (42595968348).

Almost surely, 2^127787905041 is an apocalyptic number.

It is an amenable number.

127787905041 is a deficient number, since it is larger than the sum of its proper divisors (42595968351).

127787905041 is an equidigital number, since it uses as much as digits as its factorization.

127787905041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42595968350.

The product of its (nonzero) digits is 987840, while the sum is 51.

The spelling of 127787905041 in words is "one hundred twenty-seven billion, seven hundred eighty-seven million, nine hundred five thousand, forty-one".