5139866768 has 80 divisors (see below), whose sum is σ = 10719157680. Its totient is φ = 2378956800.

The previous prime is 5139866747. The next prime is 5139866773. The reversal of 5139866768 is 8676689315.

It can be written as a sum of positive squares in 8 ways, for example, as 20178064 + 5119688704 = 4492^2 + 71552^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5833688 + ... + 5834568.

It is an arithmetic number, because the mean of its divisors is an integer number (133989471).

Almost surely, 2^5139866768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5139866768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5359578840).

5139866768 is an abundant number, since it is smaller than the sum of its proper divisors (5579290912).

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

5139866768 is a wasteful number, since it uses less digits than its factorization.

5139866768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236 (or 1230 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 59.

The square root of 5139866768 is about 71692.8641358399. The cubic root of 5139866768 is about 1725.7741277093.

The spelling of 5139866768 in words is "five billion, one hundred thirty-nine million, eight hundred sixty-six thousand, seven hundred sixty-eight".