5188778826 has 128 divisors (see below), whose sum is σ = 13222987776. Its totient is φ = 1318394880.

The previous prime is 5188778797. The next prime is 5188778827. The reversal of 5188778826 is 6288778815.

It is a self number, because there is not a number n which added to its sum of digits gives 5188778826.

It is not an unprimeable number, because it can be changed into a prime (5188778827) 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 63 ways as a sum of consecutive naturals, for example, 4619901 + ... + 4621023.

It is an arithmetic number, because the mean of its divisors is an integer number (103304592).

Almost surely, 2^5188778826 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5188778826, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6611493888).

5188778826 is an abundant number, since it is smaller than the sum of its proper divisors (8034208950).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5188778826 is a wasteful number, since it uses less digits than its factorization.

5188778826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356.

The product of its digits is 12042240, while the sum is 60.

The square root of 5188778826 is about 72033.1786470651. The cubic root of 5188778826 is about 1731.2311312032.

The spelling of 5188778826 in words is "five billion, one hundred eighty-eight million, seven hundred seventy-eight thousand, eight hundred twenty-six".