5278878365 has 8 divisors (see below), whose sum is σ = 6349286328. Its totient is φ = 4213347840.

The previous prime is 5278878361. The next prime is 5278878377. The reversal of 5278878365 is 5638788725.

It can be written as a sum of positive squares in 4 ways, for example, as 10876804 + 5268001561 = 3298^2 + 72581^2 .

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

It is not a de Polignac number, because 5278878365 - 2² = 5278878361 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5278878361) 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 7 ways as a sum of consecutive naturals, for example, 1216976 + ... + 1221305.

It is an arithmetic number, because the mean of its divisors is an integer number (793660791).

Almost surely, 2^5278878365 is an apocalyptic number.

It is an amenable number.

5278878365 is a deficient number, since it is larger than the sum of its proper divisors (1070407963).

5278878365 is a wasteful number, since it uses less digits than its factorization.

5278878365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2438719.

The product of its digits is 22579200, while the sum is 59.

The square root of 5278878365 is about 72655.8900915817. The cubic root of 5278878365 is about 1741.1942263020.

The spelling of 5278878365 in words is "five billion, two hundred seventy-eight million, eight hundred seventy-eight thousand, three hundred sixty-five".