28064083381 has 2 divisors, whose sum is σ = 28064083382. Its totient is φ = 28064083380.

The previous prime is 28064083367. The next prime is 28064083391. The reversal of 28064083381 is 18338046082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15274735281 + 12789348100 = 123591^2 + 113090^2 .

It is a cyclic number.

It is not a de Polignac number, because 28064083381 - 2⁵ = 28064083349 is a prime.

It is a super-2 number, since 2×28064083381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28064083391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14032041690 + 14032041691.

It is an arithmetic number, because the mean of its divisors is an integer number (14032041691).

Almost surely, 2^28064083381 is an apocalyptic number.

It is an amenable number.

28064083381 is a deficient number, since it is larger than the sum of its proper divisors (1).

28064083381 is an equidigital number, since it uses as much as digits as its factorization.

28064083381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221184, while the sum is 43.

The spelling of 28064083381 in words is "twenty-eight billion, sixty-four million, eighty-three thousand, three hundred eighty-one".