16771894445 has 6 divisors (see below), whose sum is σ = 20126620842. Its totient is φ = 13417283888.

The previous prime is 16771894441. The next prime is 16771894457. The reversal of 16771894445 is 54449817761.

It can be written as a sum of positive squares in 3 ways, for example, as 3604561444 + 13167333001 = 60038^2 + 114749^2 .

It is not a de Polignac number, because 16771894445 - 2² = 16771894441 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16771894441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 260627 + ... + 318543.

It is an arithmetic number, because the mean of its divisors is an integer number (3354436807).

Almost surely, 2^16771894445 is an apocalyptic number.

It is an amenable number.

16771894445 is a deficient number, since it is larger than the sum of its proper divisors (3354726397).

16771894445 is an frugal number, since it uses more digits than its factorization.

16771894445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115839 (or 57922 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 56.

The spelling of 16771894445 in words is "sixteen billion, seven hundred seventy-one million, eight hundred ninety-four thousand, four hundred forty-five".