28081648061 has 2 divisors, whose sum is σ = 28081648062. Its totient is φ = 28081648060.

The previous prime is 28081648043. The next prime is 28081648073. The reversal of 28081648061 is 16084618082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25258744900 + 2822903161 = 158930^2 + 53131^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28081648061 is a prime.

It is a super-3 number, since 3×28081648061³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28081648081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14040824030 + 14040824031.

It is an arithmetic number, because the mean of its divisors is an integer number (14040824031).

Almost surely, 2^28081648061 is an apocalyptic number.

It is an amenable number.

28081648061 is a deficient number, since it is larger than the sum of its proper divisors (1).

28081648061 is an equidigital number, since it uses as much as digits as its factorization.

28081648061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 147456, while the sum is 44.

The spelling of 28081648061 in words is "twenty-eight billion, eighty-one million, six hundred forty-eight thousand, sixty-one".