8513258549 has 2 divisors, whose sum is σ = 8513258550. Its totient is φ = 8513258548.

The previous prime is 8513258497. The next prime is 8513258557. The reversal of 8513258549 is 9458523158.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6891988324 + 1621270225 = 83018^2 + 40265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8513258549 is a prime.

It is a super-2 number, since 2×8513258549² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8513258497 and 8513258506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8513258449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4256629274 + 4256629275.

It is an arithmetic number, because the mean of its divisors is an integer number (4256629275).

Almost surely, 2^8513258549 is an apocalyptic number.

It is an amenable number.

8513258549 is a deficient number, since it is larger than the sum of its proper divisors (1).

8513258549 is an equidigital number, since it uses as much as digits as its factorization.

8513258549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728000, while the sum is 50.

The square root of 8513258549 is about 92267.3211326741. The cubic root of 8513258549 is about 2041.8881139167. Note that the first 3 decimals are identical.

The spelling of 8513258549 in words is "eight billion, five hundred thirteen million, two hundred fifty-eight thousand, five hundred forty-nine".