16783221026261 has 32 divisors (see below), whose sum is σ = 17430211307520. Its totient is φ = 16149335723136.

The previous prime is 16783221026213. The next prime is 16783221026267. The reversal of 16783221026261 is 16262012238761.

It is a cyclic number.

It is not a de Polignac number, because 16783221026261 - 2¹⁰ = 16783221025237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16783221026267) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1667147150 + ... + 1667157216.

It is an arithmetic number, because the mean of its divisors is an integer number (544694103360).

Almost surely, 2^{16783221026261} is an apocalyptic number.

It is an amenable number.

16783221026261 is a deficient number, since it is larger than the sum of its proper divisors (646990281259).

16783221026261 is a wasteful number, since it uses less digits than its factorization.

16783221026261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11753.

The product of its (nonzero) digits is 580608, while the sum is 47.

The spelling of 16783221026261 in words is "sixteen trillion, seven hundred eighty-three billion, two hundred twenty-one million, twenty-six thousand, two hundred sixty-one".