28758056060561 has 2 divisors, whose sum is σ = 28758056060562. Its totient is φ = 28758056060560.

The previous prime is 28758056060549. The next prime is 28758056060599. The reversal of 28758056060561 is 16506065085782.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28327941760000 + 430114300561 = 5322400^2 + 655831^2 .

It is a cyclic number.

It is not a de Polignac number, because 28758056060561 - 2⁶ = 28758056060497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28758056060561.

It is not a weakly prime, because it can be changed into another prime (28758056060161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14379028030280 + 14379028030281.

It is an arithmetic number, because the mean of its divisors is an integer number (14379028030281).

Almost surely, 2^{28758056060561} is an apocalyptic number.

It is an amenable number.

28758056060561 is a deficient number, since it is larger than the sum of its proper divisors (1).

28758056060561 is an equidigital number, since it uses as much as digits as its factorization.

28758056060561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192000, while the sum is 59.

The spelling of 28758056060561 in words is "twenty-eight trillion, seven hundred fifty-eight billion, fifty-six million, sixty thousand, five hundred sixty-one".