28512790619077 has 2 divisors, whose sum is σ = 28512790619078. Its totient is φ = 28512790619076.

The previous prime is 28512790619059. The next prime is 28512790619083. The reversal of 28512790619077 is 77091609721582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25308687039076 + 3204103580001 = 5030774^2 + 1790001^2 .

It is a cyclic number.

It is not a de Polignac number, because 28512790619077 - 2²³ = 28512782230469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28512790619057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14256395309538 + 14256395309539.

It is an arithmetic number, because the mean of its divisors is an integer number (14256395309539).

Almost surely, 2^{28512790619077} is an apocalyptic number.

It is an amenable number.

28512790619077 is a deficient number, since it is larger than the sum of its proper divisors (1).

28512790619077 is an equidigital number, since it uses as much as digits as its factorization.

28512790619077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26671680, while the sum is 64.

The spelling of 28512790619077 in words is "twenty-eight trillion, five hundred twelve billion, seven hundred ninety million, six hundred nineteen thousand, seventy-seven".