2116726321 has 8 divisors (see below), whose sum is σ = 2243958120. Its totient is φ = 1989796608.

The previous prime is 2116726259. The next prime is 2116726343. The reversal of 2116726321 is 1236276112.

It can be written as a sum of positive squares in 4 ways, for example, as 645160000 + 1471566321 = 25400^2 + 38361^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2116726321 - 2²⁵ = 2083171889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2116726351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61006 + ... + 89191.

It is an arithmetic number, because the mean of its divisors is an integer number (280494765).

Almost surely, 2^2116726321 is an apocalyptic number.

It is an amenable number.

2116726321 is a deficient number, since it is larger than the sum of its proper divisors (127231799).

2116726321 is a wasteful number, since it uses less digits than its factorization.

2116726321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151043.

The product of its digits is 6048, while the sum is 31.

The square root of 2116726321 is about 46007.8941161188. The cubic root of 2116726321 is about 1283.9700793761.

The spelling of 2116726321 in words is "two billion, one hundred sixteen million, seven hundred twenty-six thousand, three hundred twenty-one".