2156616041 has 4 divisors (see below), whose sum is σ = 2156746452. Its totient is φ = 2156485632.

The previous prime is 2156616037. The next prime is 2156616047. The reversal of 2156616041 is 1406166512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 770617600 + 1385998441 = 27760^2 + 37229^2 .

It is a cyclic number.

It is not a de Polignac number, because 2156616041 - 2² = 2156616037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2156615989 and 2156616007.

It is not an unprimeable number, because it can be changed into a prime (2156616047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36056 + ... + 74921.

It is an arithmetic number, because the mean of its divisors is an integer number (539186613).

Almost surely, 2^2156616041 is an apocalyptic number.

It is an amenable number.

2156616041 is a deficient number, since it is larger than the sum of its proper divisors (130411).

2156616041 is a wasteful number, since it uses less digits than its factorization.

2156616041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130410.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 2156616041 is about 46439.3802822561. The cubic root of 2156616041 is about 1291.9854131672.

The spelling of 2156616041 in words is "two billion, one hundred fifty-six million, six hundred sixteen thousand, forty-one".