16585273949 has 2 divisors, whose sum is σ = 16585273950. Its totient is φ = 16585273948.

The previous prime is 16585273921. The next prime is 16585274051. The reversal of 16585273949 is 94937258561.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12435595225 + 4149678724 = 111515^2 + 64418^2 .

It is a cyclic number.

It is not a de Polignac number, because 16585273949 - 2⁸ = 16585273693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16585273919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8292636974 + 8292636975.

It is an arithmetic number, because the mean of its divisors is an integer number (8292636975).

Almost surely, 2^16585273949 is an apocalyptic number.

It is an amenable number.

16585273949 is a deficient number, since it is larger than the sum of its proper divisors (1).

16585273949 is an equidigital number, since it uses as much as digits as its factorization.

16585273949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16329600, while the sum is 59.

The spelling of 16585273949 in words is "sixteen billion, five hundred eighty-five million, two hundred seventy-three thousand, nine hundred forty-nine".