2505235278 has 64 divisors (see below), whose sum is σ = 6197990400. Its totient is φ = 657372672.

The previous prime is 2505235241. The next prime is 2505235301. The reversal of 2505235278 is 8725325052.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 97126 + ... + 120182.

It is an arithmetic number, because the mean of its divisors is an integer number (96843600).

Almost surely, 2^2505235278 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2505235278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3098995200).

2505235278 is an abundant number, since it is smaller than the sum of its proper divisors (3692755122).

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

2505235278 is a wasteful number, since it uses less digits than its factorization.

2505235278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23281.

The product of its (nonzero) digits is 168000, while the sum is 39.

The square root of 2505235278 is about 50052.3254005246. The cubic root of 2505235278 is about 1358.1555298134.

The spelling of 2505235278 in words is "two billion, five hundred five million, two hundred thirty-five thousand, two hundred seventy-eight".