16993578941 has 2 divisors, whose sum is σ = 16993578942. Its totient is φ = 16993578940.

The previous prime is 16993578937. The next prime is 16993579019. The reversal of 16993578941 is 14987539961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15912813316 + 1080765625 = 126146^2 + 32875^2 .

It is a cyclic number.

It is not a de Polignac number, because 16993578941 - 2² = 16993578937 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16993578841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8496789470 + 8496789471.

It is an arithmetic number, because the mean of its divisors is an integer number (8496789471).

Almost surely, 2^16993578941 is an apocalyptic number.

It is an amenable number.

16993578941 is a deficient number, since it is larger than the sum of its proper divisors (1).

16993578941 is an equidigital number, since it uses as much as digits as its factorization.

16993578941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14696640, while the sum is 62.

The spelling of 16993578941 in words is "sixteen billion, nine hundred ninety-three million, five hundred seventy-eight thousand, nine hundred forty-one".