5198778915 has 24 divisors (see below), whose sum is σ = 9142979664. Its totient is φ = 2520619200.

The previous prime is 5198778913. The next prime is 5198778947.

It is a happy number.

5198778915 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 5198778915 - 2¹ = 5198778913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5198778913) 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 23 ways as a sum of consecutive naturals, for example, 1430356 + ... + 1433985.

It is an arithmetic number, because the mean of its divisors is an integer number (380957486).

Almost surely, 2^5198778915 is an apocalyptic number.

5198778915 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

5198778915 is a deficient number, since it is larger than the sum of its proper divisors (3944200749).

5198778915 is a wasteful number, since it uses less digits than its factorization.

5198778915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2864371 (or 2864360 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 60.

The square root of 5198778915 is about 72102.5583110613. The cubic root of 5198778915 is about 1732.3425908890.

The spelling of 5198778915 in words is "five billion, one hundred ninety-eight million, seven hundred seventy-eight thousand, nine hundred fifteen".