2538775278 has 32 divisors (see below), whose sum is σ = 6075703200. Its totient is φ = 781161408.

The previous prime is 2538775273. The next prime is 2538775279. The reversal of 2538775278 is 8725778352.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2538775273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1807543 + ... + 1808946.

It is an arithmetic number, because the mean of its divisors is an integer number (189865725).

Almost surely, 2^2538775278 is an apocalyptic number.

2538775278 is an abundant number, since it is smaller than the sum of its proper divisors (3536927922).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2538775278 is a wasteful number, since it uses less digits than its factorization.

2538775278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3616513 (or 3616507 counting only the distinct ones).

The product of its digits is 6585600, while the sum is 54.

The square root of 2538775278 is about 50386.2608058983. The cubic root of 2538775278 is about 1364.1896603199.

The spelling of 2538775278 in words is "two billion, five hundred thirty-eight million, seven hundred seventy-five thousand, two hundred seventy-eight".