16985154677 has 2 divisors, whose sum is σ = 16985154678. Its totient is φ = 16985154676.

The previous prime is 16985154673. The next prime is 16985154707. The reversal of 16985154677 is 77645158961.

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., 14623097476 + 2362057201 = 120926^2 + 48601^2 .

It is a cyclic number.

It is not a de Polignac number, because 16985154677 - 2² = 16985154673 is a prime.

It is a super-2 number, since 2×16985154677² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16985154673) by changing a digit.

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 as a sum of consecutive naturals, namely, 8492577338 + 8492577339.

It is an arithmetic number, because the mean of its divisors is an integer number (8492577339).

Almost surely, 2^16985154677 is an apocalyptic number.

It is an amenable number.

16985154677 is a deficient number, since it is larger than the sum of its proper divisors (1).

16985154677 is an equidigital number, since it uses as much as digits as its factorization.

16985154677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12700800, while the sum is 59.

The spelling of 16985154677 in words is "sixteen billion, nine hundred eighty-five million, one hundred fifty-four thousand, six hundred seventy-seven".