854452905689 has 2 divisors, whose sum is σ = 854452905690. Its totient is φ = 854452905688.

The previous prime is 854452905641. The next prime is 854452905739. The reversal of 854452905689 is 986509254458.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 432842936464 + 421609969225 = 657908^2 + 649315^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-854452905689 is a prime.

It is not a weakly prime, because it can be changed into another prime (854452905619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427226452844 + 427226452845.

It is an arithmetic number, because the mean of its divisors is an integer number (427226452845).

Almost surely, 2^854452905689 is an apocalyptic number.

It is an amenable number.

854452905689 is a deficient number, since it is larger than the sum of its proper divisors (1).

854452905689 is an equidigital number, since it uses as much as digits as its factorization.

854452905689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416000, while the sum is 65.

The spelling of 854452905689 in words is "eight hundred fifty-four billion, four hundred fifty-two million, nine hundred five thousand, six hundred eighty-nine".