17158391449 has 2 divisors, whose sum is σ = 17158391450. Its totient is φ = 17158391448.

The previous prime is 17158391447. The next prime is 17158391461. The reversal of 17158391449 is 94419385171.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9033171849 + 8125219600 = 95043^2 + 90140^2 .

It is a cyclic number.

It is not a de Polignac number, because 17158391449 - 2¹ = 17158391447 is a prime.

Together with 17158391447, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 17158391396 and 17158391405.

It is not a weakly prime, because it can be changed into another prime (17158391447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8579195724 + 8579195725.

It is an arithmetic number, because the mean of its divisors is an integer number (8579195725).

Almost surely, 2^17158391449 is an apocalyptic number.

It is an amenable number.

17158391449 is a deficient number, since it is larger than the sum of its proper divisors (1).

17158391449 is an equidigital number, since it uses as much as digits as its factorization.

17158391449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 52.

The spelling of 17158391449 in words is "seventeen billion, one hundred fifty-eight million, three hundred ninety-one thousand, four hundred forty-nine".