2528278265 has 8 divisors (see below), whose sum is σ = 3115932360. Its totient is φ = 1967956992.

The previous prime is 2528278241. The next prime is 2528278279. The reversal of 2528278265 is 5628728252.

It can be written as a sum of positive squares in 4 ways, for example, as 1484406784 + 1043871481 = 38528^2 + 32309^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2528278265 - 2¹² = 2528274169 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6833000 + ... + 6833369.

It is an arithmetic number, because the mean of its divisors is an integer number (389491545).

Almost surely, 2^2528278265 is an apocalyptic number.

It is an amenable number.

2528278265 is a deficient number, since it is larger than the sum of its proper divisors (587654095).

2528278265 is a wasteful number, since it uses less digits than its factorization.

2528278265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13666411.

The product of its digits is 1075200, while the sum is 47.

The square root of 2528278265 is about 50281.9874806078. The cubic root of 2528278265 is about 1362.3069023546.

The spelling of 2528278265 in words is "two billion, five hundred twenty-eight million, two hundred seventy-eight thousand, two hundred sixty-five".