28758056060509 has 2 divisors, whose sum is σ = 28758056060510. Its totient is φ = 28758056060508.

The previous prime is 28758056060497. The next prime is 28758056060519. The reversal of 28758056060509 is 90506065085782.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22658761454884 + 6099294605625 = 4760122^2 + 2469675^2 .

It is a cyclic number.

It is not a de Polignac number, because 28758056060509 - 2³³ = 28749466125917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28758056060519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14379028030254 + 14379028030255.

It is an arithmetic number, because the mean of its divisors is an integer number (14379028030255).

Almost surely, 2^{28758056060509} is an apocalyptic number.

It is an amenable number.

28758056060509 is a deficient number, since it is larger than the sum of its proper divisors (1).

28758056060509 is an equidigital number, since it uses as much as digits as its factorization.

28758056060509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288000, while the sum is 61.

The spelling of 28758056060509 in words is "twenty-eight trillion, seven hundred fifty-eight billion, fifty-six million, sixty thousand, five hundred nine".