84747861835601 has 2 divisors, whose sum is σ = 84747861835602. Its totient is φ = 84747861835600.

The previous prime is 84747861835591. The next prime is 84747861835627. The reversal of 84747861835601 is 10653816874748.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54523101568576 + 30224760267025 = 7383976^2 + 5497705^2 .

It is a cyclic number.

It is not a de Polignac number, because 84747861835601 - 2¹⁸ = 84747861573457 is a prime.

It is a super-2 number, since 2×84747861835601² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84747861835631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42373930917800 + 42373930917801.

It is an arithmetic number, because the mean of its divisors is an integer number (42373930917801).

Almost surely, 2^{84747861835601} is an apocalyptic number.

It is an amenable number.

84747861835601 is a deficient number, since it is larger than the sum of its proper divisors (1).

84747861835601 is an equidigital number, since it uses as much as digits as its factorization.

84747861835601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216760320, while the sum is 68.

The spelling of 84747861835601 in words is "eighty-four trillion, seven hundred forty-seven billion, eight hundred sixty-one million, eight hundred thirty-five thousand, six hundred one".