127856447867 has 2 divisors, whose sum is σ = 127856447868. Its totient is φ = 127856447866.

The previous prime is 127856447777. The next prime is 127856447933. The reversal of 127856447867 is 768744658721.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127856447867 is a prime.

It is a super-2 number, since 2×127856447867² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (127856447767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63928223933 + 63928223934.

It is an arithmetic number, because the mean of its divisors is an integer number (63928223934).

Almost surely, 2^127856447867 is an apocalyptic number.

127856447867 is a deficient number, since it is larger than the sum of its proper divisors (1).

127856447867 is an equidigital number, since it uses as much as digits as its factorization.

127856447867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 126443520, while the sum is 65.

The spelling of 127856447867 in words is "one hundred twenty-seven billion, eight hundred fifty-six million, four hundred forty-seven thousand, eight hundred sixty-seven".