127836315081 has 6 divisors (see below), whose sum is σ = 184652455130. Its totient is φ = 85224210048.

The previous prime is 127836315073. The next prime is 127836315083. The reversal of 127836315081 is 180513638721.

It is a happy number.

127836315081 is a `hidden beast` number, since 1 + 2 + 7 + 8 + 3 + 631 + 5 + 0 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 123032577600 + 4803737481 = 350760^2 + 69309^2 .

It is not a de Polignac number, because 127836315081 - 2³ = 127836315073 is a prime.

It is a super-2 number, since 2×127836315081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (127836315083) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7102017496 + ... + 7102017513.

Almost surely, 2^127836315081 is an apocalyptic number.

It is an amenable number.

127836315081 is a deficient number, since it is larger than the sum of its proper divisors (56816140049).

127836315081 is a wasteful number, since it uses less digits than its factorization.

127836315081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14204035015 (or 14204035012 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 127836315081 in words is "one hundred twenty-seven billion, eight hundred thirty-six million, three hundred fifteen thousand, eighty-one".