8110156721 has 2 divisors, whose sum is σ = 8110156722. Its totient is φ = 8110156720.

The previous prime is 8110156657. The next prime is 8110156751. The reversal of 8110156721 is 1276510118.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4403782321 + 3706374400 = 66361^2 + 60880^2 .

It is a cyclic number.

It is not a de Polignac number, because 8110156721 - 2⁶ = 8110156657 is a prime.

It is not a weakly prime, because it can be changed into another prime (8110156751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4055078360 + 4055078361.

It is an arithmetic number, because the mean of its divisors is an integer number (4055078361).

Almost surely, 2^8110156721 is an apocalyptic number.

It is an amenable number.

8110156721 is a deficient number, since it is larger than the sum of its proper divisors (1).

8110156721 is an equidigital number, since it uses as much as digits as its factorization.

8110156721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 32.

The square root of 8110156721 is about 90056.4085504191. The cubic root of 8110156721 is about 2009.1379124424.

Adding to 8110156721 its reverse (1276510118), we get a palindrome (9386666839).

The spelling of 8110156721 in words is "eight billion, one hundred ten million, one hundred fifty-six thousand, seven hundred twenty-one".