2557845865871 has 8 divisors (see below), whose sum is σ = 2559144846720. Its totient is φ = 2556547030872.

The previous prime is 2557845865769. The next prime is 2557845865903. The reversal of 2557845865871 is 1785685487552.

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-2557845865871 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2557845865795 and 2557845865804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2557845865271) 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 7 ways as a sum of consecutive naturals, for example, 55870436 + ... + 55916198.

It is an arithmetic number, because the mean of its divisors is an integer number (319893105840).

Almost surely, 2^{2557845865871} is an apocalyptic number.

2557845865871 is a deficient number, since it is larger than the sum of its proper divisors (1298980849).

2557845865871 is a wasteful number, since it uses less digits than its factorization.

2557845865871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72925.

The product of its digits is 752640000, while the sum is 71.

The spelling of 2557845865871 in words is "two trillion, five hundred fifty-seven billion, eight hundred forty-five million, eight hundred sixty-five thousand, eight hundred seventy-one".