16205409799 has 2 divisors, whose sum is σ = 16205409800. Its totient is φ = 16205409798.

The previous prime is 16205409761. The next prime is 16205409809. The reversal of 16205409799 is 99790450261.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16205409799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16205409599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8102704899 + 8102704900.

It is an arithmetic number, because the mean of its divisors is an integer number (8102704900).

Almost surely, 2^16205409799 is an apocalyptic number.

16205409799 is a deficient number, since it is larger than the sum of its proper divisors (1).

16205409799 is an equidigital number, since it uses as much as digits as its factorization.

16205409799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1224720, while the sum is 52.

The spelling of 16205409799 in words is "sixteen billion, two hundred five million, four hundred nine thousand, seven hundred ninety-nine".