16118943761 has 2 divisors, whose sum is σ = 16118943762. Its totient is φ = 16118943760.

The previous prime is 16118943727. The next prime is 16118943769. The reversal of 16118943761 is 16734981161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13740528400 + 2378415361 = 117220^2 + 48769^2 .

It is an emirp because it is prime and its reverse (16734981161) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16118943761 is a prime.

It is not a weakly prime, because it can be changed into another prime (16118943769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8059471880 + 8059471881.

It is an arithmetic number, because the mean of its divisors is an integer number (8059471881).

Almost surely, 2^16118943761 is an apocalyptic number.

It is an amenable number.

16118943761 is a deficient number, since it is larger than the sum of its proper divisors (1).

16118943761 is an equidigital number, since it uses as much as digits as its factorization.

16118943761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 47.

The spelling of 16118943761 in words is "sixteen billion, one hundred eighteen million, nine hundred forty-three thousand, seven hundred sixty-one".