857775661057 has 8 divisors (see below), whose sum is σ = 1022937434496. Its totient is φ = 703269485952.

The previous prime is 857775661031. The next prime is 857775661079. The reversal of 857775661057 is 750166577758.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-857775661057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 857775661057.

It is not an unprimeable number, because it can be changed into a prime (857775661007) 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 in 7 ways as a sum of consecutive naturals, for example, 2663899408 + ... + 2663899729.

It is an arithmetic number, because the mean of its divisors is an integer number (127867179312).

Almost surely, 2^857775661057 is an apocalyptic number.

It is an amenable number.

857775661057 is a deficient number, since it is larger than the sum of its proper divisors (165161773439).

857775661057 is a wasteful number, since it uses less digits than its factorization.

857775661057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5327799167.

The product of its (nonzero) digits is 86436000, while the sum is 64.

The spelling of 857775661057 in words is "eight hundred fifty-seven billion, seven hundred seventy-five million, six hundred sixty-one thousand, fifty-seven".