127391743491 has 16 divisors (see below), whose sum is σ = 172046548128. Its totient is φ = 83837376000.

The previous prime is 127391743459. The next prime is 127391743513. The reversal of 127391743491 is 194347193721.

It is not a de Polignac number, because 127391743491 - 2⁵ = 127391743459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (127391743411) 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 15 ways as a sum of consecutive naturals, for example, 521680 + ... + 725901.

It is an arithmetic number, because the mean of its divisors is an integer number (10752909258).

Almost surely, 2^127391743491 is an apocalyptic number.

127391743491 is a deficient number, since it is larger than the sum of its proper divisors (44654804637).

127391743491 is a wasteful number, since it uses less digits than its factorization.

127391743491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248022.

The product of its digits is 1143072, while the sum is 51.

The spelling of 127391743491 in words is "one hundred twenty-seven billion, three hundred ninety-one million, seven hundred forty-three thousand, four hundred ninety-one".