17885414849 has 2 divisors, whose sum is σ = 17885414850. Its totient is φ = 17885414848.

The previous prime is 17885414831. The next prime is 17885414851. The reversal of 17885414849 is 94841458871.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15839481025 + 2045933824 = 125855^2 + 45232^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17885414849 is a prime.

Together with 17885414851, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (17885414879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8942707424 + 8942707425.

It is an arithmetic number, because the mean of its divisors is an integer number (8942707425).

Almost surely, 2^17885414849 is an apocalyptic number.

It is an amenable number.

17885414849 is a deficient number, since it is larger than the sum of its proper divisors (1).

17885414849 is an equidigital number, since it uses as much as digits as its factorization.

17885414849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10321920, while the sum is 59.

The spelling of 17885414849 in words is "seventeen billion, eight hundred eighty-five million, four hundred fourteen thousand, eight hundred forty-nine".