857771463582049 has 2 divisors, whose sum is σ = 857771463582050. Its totient is φ = 857771463582048.

The previous prime is 857771463582031. The next prime is 857771463582071. The reversal of 857771463582049 is 940285364177758.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 828367143951424 + 29404319630625 = 28781368^2 + 5422575^2 .

It is a cyclic number.

It is not a de Polignac number, because 857771463582049 - 2²⁷ = 857771329364321 is a prime.

It is not a weakly prime, because it can be changed into another prime (857771463588049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428885731791024 + 428885731791025.

It is an arithmetic number, because the mean of its divisors is an integer number (428885731791025).

It is a 1-persistent number, because it is pandigital, but 2⋅857771463582049 = 1715542927164098 is not.

Almost surely, 2^{857771463582049} is an apocalyptic number.

It is an amenable number.

857771463582049 is a deficient number, since it is larger than the sum of its proper divisors (1).

857771463582049 is an equidigital number, since it uses as much as digits as its factorization.

857771463582049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2844979200, while the sum is 76.

The spelling of 857771463582049 in words is "eight hundred fifty-seven trillion, seven hundred seventy-one billion, four hundred sixty-three million, five hundred eighty-two thousand, forty-nine".