127640768685 has 16 divisors (see below), whose sum is σ = 209744831616. Its totient is φ = 66235209408.

The previous prime is 127640768663. The next prime is 127640768701. The reversal of 127640768685 is 586867046721.

It is not a de Polignac number, because 127640768685 - 2⁶ = 127640768621 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114991129 + ... + 114992238.

It is an arithmetic number, because the mean of its divisors is an integer number (13109051976).

Almost surely, 2^127640768685 is an apocalyptic number.

127640768685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

127640768685 is a deficient number, since it is larger than the sum of its proper divisors (82104062931).

127640768685 is a wasteful number, since it uses less digits than its factorization.

127640768685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229983412.

The product of its (nonzero) digits is 27095040, while the sum is 60.

The spelling of 127640768685 in words is "one hundred twenty-seven billion, six hundred forty million, seven hundred sixty-eight thousand, six hundred eighty-five".