2557161671 has 6 divisors (see below), whose sum is σ = 2571252672. Its totient is φ = 2543078180.

The previous prime is 2557161653. The next prime is 2557161679. The reversal of 2557161671 is 1761617552.

It is a de Polignac number, because none of the positive numbers 2^k-2557161671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2557161679) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 697040 + ... + 700698.

It is an arithmetic number, because the mean of its divisors is an integer number (428542112).

Almost surely, 2^2557161671 is an apocalyptic number.

2557161671 is a deficient number, since it is larger than the sum of its proper divisors (14091001).

2557161671 is an frugal number, since it uses more digits than its factorization.

2557161671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7509 (or 3850 counting only the distinct ones).

The product of its digits is 88200, while the sum is 41.

The square root of 2557161671 is about 50568.3860826109. The cubic root of 2557161671 is about 1367.4750001390.

The spelling of 2557161671 in words is "two billion, five hundred fifty-seven million, one hundred sixty-one thousand, six hundred seventy-one".