5278278578 has 12 divisors (see below), whose sum is σ = 8027377578. Its totient is φ = 2602981440.

The previous prime is 5278278547. The next prime is 5278278583. The reversal of 5278278578 is 8758728725.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 3898378969 + 1379899609 = 62437^2 + 37147^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 236963 + ... + 258278.

Almost surely, 2^5278278578 is an apocalyptic number.

5278278578 is a deficient number, since it is larger than the sum of its proper divisors (2749099000).

5278278578 is an equidigital number, since it uses as much as digits as its factorization.

5278278578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495389 (or 495316 counting only the distinct ones).

The product of its digits is 17561600, while the sum is 59.

The square root of 5278278578 is about 72651.7623874328. The cubic root of 5278278578 is about 1741.1282788826.

The spelling of 5278278578 in words is "five billion, two hundred seventy-eight million, two hundred seventy-eight thousand, five hundred seventy-eight".