2116505461 has 6 divisors (see below), whose sum is σ = 2462057430. Its totient is φ = 1814147496.

The previous prime is 2116505453. The next prime is 2116505473. The reversal of 2116505461 is 1645056112.

It can be written as a sum of positive squares in only one way, i.e., 1620062500 + 496442961 = 40250^2 + 22281^2 .

It is not a de Polignac number, because 2116505461 - 2³ = 2116505453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2116505401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21596946 + ... + 21597043.

It is an arithmetic number, because the mean of its divisors is an integer number (410342905).

Almost surely, 2^2116505461 is an apocalyptic number.

It is an amenable number.

2116505461 is a deficient number, since it is larger than the sum of its proper divisors (345551969).

2116505461 is an equidigital number, since it uses as much as digits as its factorization.

2116505461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43194003 (or 43193996 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 2116505461 is about 46005.4938132393. The cubic root of 2116505461 is about 1283.9254211866.

The spelling of 2116505461 in words is "two billion, one hundred sixteen million, five hundred five thousand, four hundred sixty-one".