5188778554 has 4 divisors (see below), whose sum is σ = 7783167834. Its totient is φ = 2594389276.

The previous prime is 5188778549. The next prime is 5188778563. The reversal of 5188778554 is 4558778815.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4558778815 = 5 ⋅911755763.

It can be written as a sum of positive squares in only one way, i.e., 4492082529 + 696696025 = 67023^2 + 26395^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 as a sum of consecutive naturals, namely, 1297194637 + ... + 1297194640.

Almost surely, 2^5188778554 is an apocalyptic number.

5188778554 is a deficient number, since it is larger than the sum of its proper divisors (2594389280).

5188778554 is a wasteful number, since it uses less digits than its factorization.

5188778554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2594389279.

The product of its digits is 12544000, while the sum is 58.

The square root of 5188778554 is about 72033.1767590462. The cubic root of 5188778554 is about 1731.2311009523.

The spelling of 5188778554 in words is "five billion, one hundred eighty-eight million, seven hundred seventy-eight thousand, five hundred fifty-four".