16613426825 has 6 divisors (see below), whose sum is σ = 20600649294. Its totient is φ = 13290741440.

The previous prime is 16613426803. The next prime is 16613426839. The reversal of 16613426825 is 52862431661.

It can be written as a sum of positive squares in 3 ways, for example, as 2658021136 + 13955405689 = 51556^2 + 118133^2 .

It is not a de Polignac number, because 16613426825 - 2⁸ = 16613426569 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 332268512 + ... + 332268561.

It is an arithmetic number, because the mean of its divisors is an integer number (3433441549).

Almost surely, 2^16613426825 is an apocalyptic number.

It is an amenable number.

16613426825 is a deficient number, since it is larger than the sum of its proper divisors (3987222469).

16613426825 is an equidigital number, since it uses as much as digits as its factorization.

16613426825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664537083 (or 664537078 counting only the distinct ones).

The product of its digits is 414720, while the sum is 44.

The spelling of 16613426825 in words is "sixteen billion, six hundred thirteen million, four hundred twenty-six thousand, eight hundred twenty-five".