5261278018 has 8 divisors (see below), whose sum is σ = 7906506300. Its totient is φ = 2625775920.

The previous prime is 5261277941. The next prime is 5261278021. The reversal of 5261278018 is 8108721625.

It can be written as a sum of positive squares in 2 ways, for example, as 4412546329 + 848731689 = 66427^2 + 29133^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2430193 + ... + 2432356.

Almost surely, 2^5261278018 is an apocalyptic number.

5261278018 is a deficient number, since it is larger than the sum of its proper divisors (2645228282).

5261278018 is a wasteful number, since it uses less digits than its factorization.

5261278018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4863092.

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 5261278018 is about 72534.6676975913. The cubic root of 5261278018 is about 1739.2569622166.

The spelling of 5261278018 in words is "five billion, two hundred sixty-one million, two hundred seventy-eight thousand, eighteen".