16103666549 has 2 divisors, whose sum is σ = 16103666550. Its totient is φ = 16103666548.

The previous prime is 16103666533. The next prime is 16103666561. The reversal of 16103666549 is 94566630161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8689595524 + 7414071025 = 93218^2 + 86105^2 .

It is a cyclic number.

It is not a de Polignac number, because 16103666549 - 2⁴ = 16103666533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16103663549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8051833274 + 8051833275.

It is an arithmetic number, because the mean of its divisors is an integer number (8051833275).

Almost surely, 2^16103666549 is an apocalyptic number.

It is an amenable number.

16103666549 is a deficient number, since it is larger than the sum of its proper divisors (1).

16103666549 is an equidigital number, since it uses as much as digits as its factorization.

16103666549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 699840, while the sum is 47.

The spelling of 16103666549 in words is "sixteen billion, one hundred three million, six hundred sixty-six thousand, five hundred forty-nine".