857825120177 has 4 divisors (see below), whose sum is σ = 857883280740. Its totient is φ = 857766959616.

The previous prime is 857825120171. The next prime is 857825120189. The reversal of 857825120177 is 771021528758.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 723547579456 + 134277540721 = 850616^2 + 366439^2 .

It is a cyclic number.

It is not a de Polignac number, because 857825120177 - 2²⁴ = 857808342961 is a prime.

It is a super-2 number, since 2×857825120177² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (857825120171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29058152 + ... + 29087657.

It is an arithmetic number, because the mean of its divisors is an integer number (214470820185).

Almost surely, 2^857825120177 is an apocalyptic number.

It is an amenable number.

857825120177 is a deficient number, since it is larger than the sum of its proper divisors (58160563).

857825120177 is a wasteful number, since it uses less digits than its factorization.

857825120177 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58160562.

The product of its (nonzero) digits is 2195200, while the sum is 53.

The spelling of 857825120177 in words is "eight hundred fifty-seven billion, eight hundred twenty-five million, one hundred twenty thousand, one hundred seventy-seven".