16205978259 has 16 divisors (see below), whose sum is σ = 24010980000. Its totient is φ = 10803030048.

The previous prime is 16205978249. The next prime is 16205978309. The reversal of 16205978259 is 95287950261.

16205978259 is a `hidden beast` number, since 1 + 6 + 20 + 597 + 8 + 25 + 9 = 666.

It is not a de Polignac number, because 16205978259 - 2¹¹ = 16205976211 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (16205978219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 422617 + ... + 459365.

It is an arithmetic number, because the mean of its divisors is an integer number (1500686250).

Almost surely, 2^16205978259 is an apocalyptic number.

16205978259 is a deficient number, since it is larger than the sum of its proper divisors (7805001741).

16205978259 is a wasteful number, since it uses less digits than its factorization.

16205978259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53091 (or 53085 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 54.

The spelling of 16205978259 in words is "sixteen billion, two hundred five million, nine hundred seventy-eight thousand, two hundred fifty-nine".