16806078617 has 4 divisors (see below), whose sum is σ = 17260296996. Its totient is φ = 16351860240.

The previous prime is 16806078593. The next prime is 16806078631. The reversal of 16806078617 is 71687060861.

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 9227331481 + 7578747136 = 96059^2 + 87056^2 .

It is a cyclic number.

It is not a de Polignac number, because 16806078617 - 2¹⁴ = 16806062233 is a prime.

It is a super-3 number, since 3×16806078617³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16806078647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227109134 + ... + 227109207.

It is an arithmetic number, because the mean of its divisors is an integer number (4315074249).

Almost surely, 2^16806078617 is an apocalyptic number.

It is an amenable number.

16806078617 is a deficient number, since it is larger than the sum of its proper divisors (454218379).

16806078617 is an equidigital number, since it uses as much as digits as its factorization.

16806078617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454218378.

The product of its (nonzero) digits is 677376, while the sum is 50.

The spelling of 16806078617 in words is "sixteen billion, eight hundred six million, seventy-eight thousand, six hundred seventeen".