28502774083681 has 2 divisors, whose sum is σ = 28502774083682. Its totient is φ = 28502774083680.

The previous prime is 28502774083673. The next prime is 28502774083687. The reversal of 28502774083681 is 18638047720582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28488425877025 + 14348206656 = 5337455^2 + 119784^2 .

It is a cyclic number.

It is not a de Polignac number, because 28502774083681 - 2³ = 28502774083673 is a prime.

It is a super-2 number, since 2×28502774083681² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28502774083687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14251387041840 + 14251387041841.

It is an arithmetic number, because the mean of its divisors is an integer number (14251387041841).

Almost surely, 2^{28502774083681} is an apocalyptic number.

It is an amenable number.

28502774083681 is a deficient number, since it is larger than the sum of its proper divisors (1).

28502774083681 is an equidigital number, since it uses as much as digits as its factorization.

28502774083681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36126720, while the sum is 61.

The spelling of 28502774083681 in words is "twenty-eight trillion, five hundred two billion, seven hundred seventy-four million, eighty-three thousand, six hundred eighty-one".