861646030127 has 2 divisors, whose sum is σ = 861646030128. Its totient is φ = 861646030126.

The previous prime is 861646030057. The next prime is 861646030129. The reversal of 861646030127 is 721030646168.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 861646030127 - 2¹⁶ = 861645964591 is a prime.

It is a super-2 number, since 2×861646030127² (a number of 25 digits) contains 22 as substring.

Together with 861646030129, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (861646030129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430823015063 + 430823015064.

It is an arithmetic number, because the mean of its divisors is an integer number (430823015064).

Almost surely, 2^861646030127 is an apocalyptic number.

861646030127 is a deficient number, since it is larger than the sum of its proper divisors (1).

861646030127 is an equidigital number, since it uses as much as digits as its factorization.

861646030127 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 44.

The spelling of 861646030127 in words is "eight hundred sixty-one billion, six hundred forty-six million, thirty thousand, one hundred twenty-seven".