16398746605 has 4 divisors (see below), whose sum is σ = 19678495932. Its totient is φ = 13118997280.

The previous prime is 16398746587. The next prime is 16398746627. The reversal of 16398746605 is 50664789361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11607476644 + 4791269961 = 107738^2 + 69219^2 .

It is not a de Polignac number, because 16398746605 - 2⁷ = 16398746477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1639874656 + ... + 1639874665.

It is an arithmetic number, because the mean of its divisors is an integer number (4919623983).

Almost surely, 2^16398746605 is an apocalyptic number.

It is an amenable number.

16398746605 is a deficient number, since it is larger than the sum of its proper divisors (3279749327).

16398746605 is an equidigital number, since it uses as much as digits as its factorization.

16398746605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3279749326.

The product of its (nonzero) digits is 6531840, while the sum is 55.

The spelling of 16398746605 in words is "sixteen billion, three hundred ninety-eight million, seven hundred forty-six thousand, six hundred five".