819593009077 has 2 divisors, whose sum is σ = 819593009078. Its totient is φ = 819593009076.

The previous prime is 819593009033. The next prime is 819593009089. The reversal of 819593009077 is 770900395918.

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., 462609463716 + 356983545361 = 680154^2 + 597481^2 .

It is a cyclic number.

It is not a de Polignac number, because 819593009077 - 2¹¹ = 819593007029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (819593009377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409796504538 + 409796504539.

It is an arithmetic number, because the mean of its divisors is an integer number (409796504539).

Almost surely, 2^819593009077 is an apocalyptic number.

It is an amenable number.

819593009077 is a deficient number, since it is larger than the sum of its proper divisors (1).

819593009077 is an equidigital number, since it uses as much as digits as its factorization.

819593009077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4286520, while the sum is 58.

The spelling of 819593009077 in words is "eight hundred nineteen billion, five hundred ninety-three million, nine thousand, seventy-seven".