2543775261 has 8 divisors (see below), whose sum is σ = 3403771584. Its totient is φ = 1689814560.

The previous prime is 2543775257. The next prime is 2543775287. The reversal of 2543775261 is 1625773452.

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

It is not a de Polignac number, because 2543775261 - 2² = 2543775257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2543775211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1507921 + ... + 1509606.

It is an arithmetic number, because the mean of its divisors is an integer number (425471448).

Almost surely, 2^2543775261 is an apocalyptic number.

It is an amenable number.

2543775261 is a deficient number, since it is larger than the sum of its proper divisors (859996323).

2543775261 is a wasteful number, since it uses less digits than its factorization.

2543775261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3017811.

The product of its digits is 352800, while the sum is 42.

The square root of 2543775261 is about 50435.8529322148. The cubic root of 2543775261 is about 1365.0846393866.

The spelling of 2543775261 in words is "two billion, five hundred forty-three million, seven hundred seventy-five thousand, two hundred sixty-one".