84747861838663 has 2 divisors, whose sum is σ = 84747861838664. Its totient is φ = 84747861838662.

The previous prime is 84747861838589. The next prime is 84747861838697. The reversal of 84747861838663 is 36683816874748.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84747861838663 - 2³³ = 84739271904071 is a prime.

It is a super-2 number, since 2×84747861838663² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84747862838663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42373930919331 + 42373930919332.

It is an arithmetic number, because the mean of its divisors is an integer number (42373930919332).

Almost surely, 2^{84747861838663} is an apocalyptic number.

84747861838663 is a deficient number, since it is larger than the sum of its proper divisors (1).

84747861838663 is an equidigital number, since it uses as much as digits as its factorization.

84747861838663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6242697216, while the sum is 79.

The spelling of 84747861838663 in words is "eighty-four trillion, seven hundred forty-seven billion, eight hundred sixty-one million, eight hundred thirty-eight thousand, six hundred sixty-three".