127861705857 has 16 divisors (see below), whose sum is σ = 172599672960. Its totient is φ = 84187468800.

The previous prime is 127861705847. The next prime is 127861705859. The reversal of 127861705857 is 758507168721.

It is a happy number.

It is not a de Polignac number, because 127861705857 - 2¹² = 127861701761 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 127861705797 and 127861705806.

It is not an unprimeable number, because it can be changed into a prime (127861705859) 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 15 ways as a sum of consecutive naturals, for example, 526944 + ... + 730337.

It is an arithmetic number, because the mean of its divisors is an integer number (10787479560).

Almost surely, 2^127861705857 is an apocalyptic number.

It is an amenable number.

127861705857 is a deficient number, since it is larger than the sum of its proper divisors (44737967103).

127861705857 is a wasteful number, since it uses less digits than its factorization.

127861705857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257704.

The product of its (nonzero) digits is 6585600, while the sum is 57.

The spelling of 127861705857 in words is "one hundred twenty-seven billion, eight hundred sixty-one million, seven hundred five thousand, eight hundred fifty-seven".