8456436989489 has 2 divisors, whose sum is σ = 8456436989490. Its totient is φ = 8456436989488.

The previous prime is 8456436989449. The next prime is 8456436989503. The reversal of 8456436989489 is 9849896346548.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7173869414464 + 1282567575025 = 2678408^2 + 1132505^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8456436989489 is a prime.

It is a super-2 number, since 2×8456436989489² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8456436989449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4228218494744 + 4228218494745.

It is an arithmetic number, because the mean of its divisors is an integer number (4228218494745).

Almost surely, 2^{8456436989489} is an apocalyptic number.

It is an amenable number.

8456436989489 is a deficient number, since it is larger than the sum of its proper divisors (1).

8456436989489 is an equidigital number, since it uses as much as digits as its factorization.

8456436989489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12899450880, while the sum is 83.

The spelling of 8456436989489 in words is "eight trillion, four hundred fifty-six billion, four hundred thirty-six million, nine hundred eighty-nine thousand, four hundred eighty-nine".