16856227963 has 2 divisors, whose sum is σ = 16856227964. Its totient is φ = 16856227962.

The previous prime is 16856227933. The next prime is 16856227981. The reversal of 16856227963 is 36972265861.

It is a strong prime.

It is an emirp because it is prime and its reverse (36972265861) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16856227963 is a prime.

It is a super-2 number, since 2×16856227963² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16856227933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8428113981 + 8428113982.

It is an arithmetic number, because the mean of its divisors is an integer number (8428113982).

Almost surely, 2^16856227963 is an apocalyptic number.

16856227963 is a deficient number, since it is larger than the sum of its proper divisors (1).

16856227963 is an equidigital number, since it uses as much as digits as its factorization.

16856227963 is an evil number, because the sum of its binary digits is even.

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

The spelling of 16856227963 in words is "sixteen billion, eight hundred fifty-six million, two hundred twenty-seven thousand, nine hundred sixty-three".