127687890175849 has 4 divisors (see below), whose sum is σ = 130657375993936. Its totient is φ = 124718404357764.

The previous prime is 127687890175837. The next prime is 127687890175891. The reversal of 127687890175849 is 948571098786721.

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.

It is a cyclic number.

It is not a de Polignac number, because 127687890175849 - 2⁷ = 127687890175721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127687890175819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1484742908979 + ... + 1484742909064.

It is an arithmetic number, because the mean of its divisors is an integer number (32664343998484).

Almost surely, 2^{127687890175849} is an apocalyptic number.

It is an amenable number.

127687890175849 is a deficient number, since it is larger than the sum of its proper divisors (2969485818087).

127687890175849 is an equidigital number, since it uses as much as digits as its factorization.

127687890175849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2969485818086.

The product of its (nonzero) digits is 3413975040, while the sum is 82.

The spelling of 127687890175849 in words is "one hundred twenty-seven trillion, six hundred eighty-seven billion, eight hundred ninety million, one hundred seventy-five thousand, eight hundred forty-nine".