2548661287 has 4 divisors (see below), whose sum is σ = 2548881576. Its totient is φ = 2548441000.

The previous prime is 2548661261. The next prime is 2548661293. The reversal of 2548661287 is 7821668452.

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

It is a cyclic number.

It is not a de Polignac number, because 2548661287 - 2¹⁵ = 2548628519 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 2548661287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2548661587) 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 3 ways as a sum of consecutive naturals, for example, 91768 + ... + 116269.

It is an arithmetic number, because the mean of its divisors is an integer number (637220394).

Almost surely, 2^2548661287 is an apocalyptic number.

2548661287 is a deficient number, since it is larger than the sum of its proper divisors (220289).

2548661287 is a wasteful number, since it uses less digits than its factorization.

2548661287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220288.

The product of its digits is 1290240, while the sum is 49.

The square root of 2548661287 is about 50484.2677177752. The cubic root of 2548661287 is about 1365.9580882939.

The spelling of 2548661287 in words is "two billion, five hundred forty-eight million, six hundred sixty-one thousand, two hundred eighty-seven".