16961556847 has 2 divisors, whose sum is σ = 16961556848. Its totient is φ = 16961556846.

The previous prime is 16961556811. The next prime is 16961556893. The reversal of 16961556847 is 74865516961.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16961556847 - 2⁷ = 16961556719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16961556791 and 16961556800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16961506847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8480778423 + 8480778424.

It is an arithmetic number, because the mean of its divisors is an integer number (8480778424).

Almost surely, 2^16961556847 is an apocalyptic number.

16961556847 is a deficient number, since it is larger than the sum of its proper divisors (1).

16961556847 is an equidigital number, since it uses as much as digits as its factorization.

16961556847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10886400, while the sum is 58.

The spelling of 16961556847 in words is "sixteen billion, nine hundred sixty-one million, five hundred fifty-six thousand, eight hundred forty-seven".