857775600361 has 2 divisors, whose sum is σ = 857775600362. Its totient is φ = 857775600360.

The previous prime is 857775600359. The next prime is 857775600373. The reversal of 857775600361 is 163006577758.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 457339760361 + 400435840000 = 676269^2 + 632800^2 .

It is a cyclic number.

It is not a de Polignac number, because 857775600361 - 2¹ = 857775600359 is a prime.

Together with 857775600359, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (857775606361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428887800180 + 428887800181.

It is an arithmetic number, because the mean of its divisors is an integer number (428887800181).

Almost surely, 2^857775600361 is an apocalyptic number.

It is an amenable number.

857775600361 is a deficient number, since it is larger than the sum of its proper divisors (1).

857775600361 is an equidigital number, since it uses as much as digits as its factorization.

857775600361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7408800, while the sum is 55.

The spelling of 857775600361 in words is "eight hundred fifty-seven billion, seven hundred seventy-five million, six hundred thousand, three hundred sixty-one".