84864369281 has 2 divisors, whose sum is σ = 84864369282. Its totient is φ = 84864369280.

The previous prime is 84864369181. The next prime is 84864369299. The reversal of 84864369281 is 18296346848.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51805856881 + 33058512400 = 227609^2 + 181820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84864369281 is a prime.

It is a super-2 number, since 2×84864369281² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 84864369281.

It is not a weakly prime, because it can be changed into another prime (84864369181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42432184640 + 42432184641.

It is an arithmetic number, because the mean of its divisors is an integer number (42432184641).

Almost surely, 2^84864369281 is an apocalyptic number.

It is an amenable number.

84864369281 is a deficient number, since it is larger than the sum of its proper divisors (1).

84864369281 is an equidigital number, since it uses as much as digits as its factorization.

84864369281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15925248, while the sum is 59.

The spelling of 84864369281 in words is "eighty-four billion, eight hundred sixty-four million, three hundred sixty-nine thousand, two hundred eighty-one".