16100404549 has 2 divisors, whose sum is σ = 16100404550. Its totient is φ = 16100404548.

The previous prime is 16100404517. The next prime is 16100404561. The reversal of 16100404549 is 94540400161.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14039880100 + 2060524449 = 118490^2 + 45393^2 .

It is a cyclic number.

It is not a de Polignac number, because 16100404549 - 2⁵ = 16100404517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16100404589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8050202274 + 8050202275.

It is an arithmetic number, because the mean of its divisors is an integer number (8050202275).

Almost surely, 2^16100404549 is an apocalyptic number.

It is an amenable number.

16100404549 is a deficient number, since it is larger than the sum of its proper divisors (1).

16100404549 is an equidigital number, since it uses as much as digits as its factorization.

16100404549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 34.

The spelling of 16100404549 in words is "sixteen billion, one hundred million, four hundred four thousand, five hundred forty-nine".