857445877273 has 2 divisors, whose sum is σ = 857445877274. Its totient is φ = 857445877272.

The previous prime is 857445877261. The next prime is 857445877279. The reversal of 857445877273 is 372778544758.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 786621764889 + 70824112384 = 886917^2 + 266128^2 .

It is a cyclic number.

It is not a de Polignac number, because 857445877273 - 2²¹ = 857443780121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 857445877199 and 857445877208.

It is not a weakly prime, because it can be changed into another prime (857445877279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428722938636 + 428722938637.

It is an arithmetic number, because the mean of its divisors is an integer number (428722938637).

Almost surely, 2^857445877273 is an apocalyptic number.

It is an amenable number.

857445877273 is a deficient number, since it is larger than the sum of its proper divisors (1).

857445877273 is an equidigital number, since it uses as much as digits as its factorization.

857445877273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 368793600, while the sum is 67.

The spelling of 857445877273 in words is "eight hundred fifty-seven billion, four hundred forty-five million, eight hundred seventy-seven thousand, two hundred seventy-three".