127892991537 has 12 divisors (see below), whose sum is σ = 189240036804. Its totient is φ = 83182433280.

The previous prime is 127892991529. The next prime is 127892991571. The reversal of 127892991537 is 735199298721.

127892991537 is a `hidden beast` number, since 1 + 2 + 7 + 8 + 9 + 2 + 9 + 91 + 537 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 77795808561 + 50097182976 = 278919^2 + 223824^2 .

It is not a de Polignac number, because 127892991537 - 2³ = 127892991529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (127892992537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 173296368 + ... + 173297105.

It is an arithmetic number, because the mean of its divisors is an integer number (15770003067).

Almost surely, 2^127892991537 is an apocalyptic number.

It is an amenable number.

127892991537 is a deficient number, since it is larger than the sum of its proper divisors (61347045267).

127892991537 is a wasteful number, since it uses less digits than its factorization.

127892991537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346593520 (or 346593517 counting only the distinct ones).

The product of its digits is 17146080, while the sum is 63.

The spelling of 127892991537 in words is "one hundred twenty-seven billion, eight hundred ninety-two million, nine hundred ninety-one thousand, five hundred thirty-seven".