16205409793 has 4 divisors (see below), whose sum is σ = 16205929920. Its totient is φ = 16204889668.

The previous prime is 16205409761. The next prime is 16205409799. The reversal of 16205409793 is 39790450261.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39790450261 = 3413 ⋅11658497.

It is a cyclic number.

It is not a de Polignac number, because 16205409793 - 2⁵ = 16205409761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16205409799) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210133 + ... + 276706.

It is an arithmetic number, because the mean of its divisors is an integer number (4051482480).

Almost surely, 2^16205409793 is an apocalyptic number.

It is an amenable number.

16205409793 is a deficient number, since it is larger than the sum of its proper divisors (520127).

16205409793 is an equidigital number, since it uses as much as digits as its factorization.

16205409793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520126.

The product of its (nonzero) digits is 408240, while the sum is 46.

The spelling of 16205409793 in words is "sixteen billion, two hundred five million, four hundred nine thousand, seven hundred ninety-three".