84594249569 has 2 divisors, whose sum is σ = 84594249570. Its totient is φ = 84594249568.

The previous prime is 84594249563. The next prime is 84594249587. The reversal of 84594249569 is 96594249548.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78574817344 + 6019432225 = 280312^2 + 77585^2 .

It is a cyclic number.

It is not a de Polignac number, because 84594249569 - 2¹² = 84594245473 is a prime.

It is a super-2 number, since 2×84594249569² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84594249563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42297124784 + 42297124785.

It is an arithmetic number, because the mean of its divisors is an integer number (42297124785).

Almost surely, 2^84594249569 is an apocalyptic number.

It is an amenable number.

84594249569 is a deficient number, since it is larger than the sum of its proper divisors (1).

84594249569 is an equidigital number, since it uses as much as digits as its factorization.

84594249569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 111974400, while the sum is 65.

The spelling of 84594249569 in words is "eighty-four billion, five hundred ninety-four million, two hundred forty-nine thousand, five hundred sixty-nine".