16500051361 has 2 divisors, whose sum is σ = 16500051362. Its totient is φ = 16500051360.

The previous prime is 16500051331. The next prime is 16500051427. The reversal of 16500051361 is 16315000561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16273849761 + 226201600 = 127569^2 + 15040^2 .

It is a cyclic number.

It is not a de Polignac number, because 16500051361 - 2⁵ = 16500051329 is a prime.

It is not a weakly prime, because it can be changed into another prime (16500051331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8250025680 + 8250025681.

It is an arithmetic number, because the mean of its divisors is an integer number (8250025681).

Almost surely, 2^16500051361 is an apocalyptic number.

It is an amenable number.

16500051361 is a deficient number, since it is larger than the sum of its proper divisors (1).

16500051361 is an equidigital number, since it uses as much as digits as its factorization.

16500051361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 28.

The spelling of 16500051361 in words is "sixteen billion, five hundred million, fifty-one thousand, three hundred sixty-one".