862656193891 has 2 divisors, whose sum is σ = 862656193892. Its totient is φ = 862656193890.

The previous prime is 862656193829. The next prime is 862656193901. The reversal of 862656193891 is 198391656268.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 862656193891 - 2¹⁷ = 862656062819 is a prime.

It is not a weakly prime, because it can be changed into another prime (862656193691) 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, 431328096945 + 431328096946.

It is an arithmetic number, because the mean of its divisors is an integer number (431328096946).

Almost surely, 2^862656193891 is an apocalyptic number.

862656193891 is a deficient number, since it is larger than the sum of its proper divisors (1).

862656193891 is an equidigital number, since it uses as much as digits as its factorization.

862656193891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33592320, while the sum is 64.

The spelling of 862656193891 in words is "eight hundred sixty-two billion, six hundred fifty-six million, one hundred ninety-three thousand, eight hundred ninety-one".