8780837728081 has 2 divisors, whose sum is σ = 8780837728082. Its totient is φ = 8780837728080.

The previous prime is 8780837728051. The next prime is 8780837728099. The reversal of 8780837728081 is 1808277380878.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4590284825025 + 4190552903056 = 2142495^2 + 2047084^2 .

It is a cyclic number.

It is not a de Polignac number, because 8780837728081 - 2²⁵ = 8780804173649 is a prime.

It is a super-2 number, since 2×8780837728081² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8780837727998 and 8780837728016.

It is not a weakly prime, because it can be changed into another prime (8780837728051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4390418864040 + 4390418864041.

It is an arithmetic number, because the mean of its divisors is an integer number (4390418864041).

Almost surely, 2^{8780837728081} is an apocalyptic number.

It is an amenable number.

8780837728081 is a deficient number, since it is larger than the sum of its proper divisors (1).

8780837728081 is an equidigital number, since it uses as much as digits as its factorization.

8780837728081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67436544, while the sum is 67.

The spelling of 8780837728081 in words is "eight trillion, seven hundred eighty billion, eight hundred thirty-seven million, seven hundred twenty-eight thousand, eighty-one".