828778770461 has 2 divisors, whose sum is σ = 828778770462. Its totient is φ = 828778770460.

The previous prime is 828778770437. The next prime is 828778770509. The reversal of 828778770461 is 164077877828.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 657386910436 + 171391860025 = 810794^2 + 413995^2 .

It is a cyclic number.

It is not a de Polignac number, because 828778770461 - 2⁶ = 828778770397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (828778770401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 414389385230 + 414389385231.

It is an arithmetic number, because the mean of its divisors is an integer number (414389385231).

Almost surely, 2^828778770461 is an apocalyptic number.

It is an amenable number.

828778770461 is a deficient number, since it is larger than the sum of its proper divisors (1).

828778770461 is an equidigital number, since it uses as much as digits as its factorization.

828778770461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 59006976, while the sum is 65.

The spelling of 828778770461 in words is "eight hundred twenty-eight billion, seven hundred seventy-eight million, seven hundred seventy thousand, four hundred sixty-one".