16458878058949 has 2 divisors, whose sum is σ = 16458878058950. Its totient is φ = 16458878058948.

The previous prime is 16458878058929. The next prime is 16458878058967. The reversal of 16458878058949 is 94985087885461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9725553690724 + 6733324368225 = 3118582^2 + 2594865^2 .

It is a cyclic number.

It is not a de Polignac number, because 16458878058949 - 2⁹ = 16458878058437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16458878058929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8229439029474 + 8229439029475.

It is an arithmetic number, because the mean of its divisors is an integer number (8229439029475).

Almost surely, 2^{16458878058949} is an apocalyptic number.

It is an amenable number.

16458878058949 is a deficient number, since it is larger than the sum of its proper divisors (1).

16458878058949 is an equidigital number, since it uses as much as digits as its factorization.

16458878058949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5573836800, while the sum is 82.

The spelling of 16458878058949 in words is "sixteen trillion, four hundred fifty-eight billion, eight hundred seventy-eight million, fifty-eight thousand, nine hundred forty-nine".