857445877279 has 2 divisors, whose sum is σ = 857445877280. Its totient is φ = 857445877278.

The previous prime is 857445877273. The next prime is 857445877339. The reversal of 857445877279 is 972778544758.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-857445877279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (857445877273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428722938639 + 428722938640.

It is an arithmetic number, because the mean of its divisors is an integer number (428722938640).

Almost surely, 2^857445877279 is an apocalyptic number.

857445877279 is a deficient number, since it is larger than the sum of its proper divisors (1).

857445877279 is an equidigital number, since it uses as much as digits as its factorization.

857445877279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1106380800, while the sum is 73.

The spelling of 857445877279 in words is "eight hundred fifty-seven billion, four hundred forty-five million, eight hundred seventy-seven thousand, two hundred seventy-nine".