28758051866641 has 2 divisors, whose sum is σ = 28758051866642. Its totient is φ = 28758051866640.

The previous prime is 28758051866623. The next prime is 28758051866669. The reversal of 28758051866641 is 14666815085782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17805235140625 + 10952816726016 = 4219625^2 + 3309504^2 .

It is a cyclic number.

It is not a de Polignac number, because 28758051866641 - 2¹³ = 28758051858449 is a prime.

It is not a weakly prime, because it can be changed into another prime (28758051866681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14379025933320 + 14379025933321.

It is an arithmetic number, because the mean of its divisors is an integer number (14379025933321).

Almost surely, 2^{28758051866641} is an apocalyptic number.

It is an amenable number.

28758051866641 is a deficient number, since it is larger than the sum of its proper divisors (1).

28758051866641 is an equidigital number, since it uses as much as digits as its factorization.

28758051866641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 154828800, while the sum is 67.

The spelling of 28758051866641 in words is "twenty-eight trillion, seven hundred fifty-eight billion, fifty-one million, eight hundred sixty-six thousand, six hundred forty-one".