16435587449 has 2 divisors, whose sum is σ = 16435587450. Its totient is φ = 16435587448.

The previous prime is 16435587391. The next prime is 16435587473. The reversal of 16435587449 is 94478553461.

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., 14572111225 + 1863476224 = 120715^2 + 43168^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16435587449 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16435587394 and 16435587403.

It is not a weakly prime, because it can be changed into another prime (16435587349) 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, 8217793724 + 8217793725.

It is an arithmetic number, because the mean of its divisors is an integer number (8217793725).

Almost surely, 2^16435587449 is an apocalyptic number.

It is an amenable number.

16435587449 is a deficient number, since it is larger than the sum of its proper divisors (1).

16435587449 is an equidigital number, since it uses as much as digits as its factorization.

16435587449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14515200, while the sum is 56.

The spelling of 16435587449 in words is "sixteen billion, four hundred thirty-five million, five hundred eighty-seven thousand, four hundred forty-nine".