127991675699 has 4 divisors (see below), whose sum is σ = 128041733664. Its totient is φ = 127941617736.

The previous prime is 127991675689. The next prime is 127991675719. The reversal of 127991675699 is 996576199721.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 127991675699 - 2⁸ = 127991675443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127991675629) 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, 25025147 + ... + 25030260.

It is an arithmetic number, because the mean of its divisors is an integer number (32010433416).

Almost surely, 2^127991675699 is an apocalyptic number.

127991675699 is a deficient number, since it is larger than the sum of its proper divisors (50057965).

127991675699 is an equidigital number, since it uses as much as digits as its factorization.

127991675699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50057964.

The product of its digits is 115736040, while the sum is 71.

The spelling of 127991675699 in words is "one hundred twenty-seven billion, nine hundred ninety-one million, six hundred seventy-five thousand, six hundred ninety-nine".