5198578499 has 2 divisors, whose sum is σ = 5198578500. Its totient is φ = 5198578498.

The previous prime is 5198578487. The next prime is 5198578579. The reversal of 5198578499 is 9948758915.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5198578499 is a prime.

It is not a weakly prime, because it can be changed into another prime (5198578409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2599289249 + 2599289250.

It is an arithmetic number, because the mean of its divisors is an integer number (2599289250).

Almost surely, 2^5198578499 is an apocalyptic number.

5198578499 is a deficient number, since it is larger than the sum of its proper divisors (1).

5198578499 is an equidigital number, since it uses as much as digits as its factorization.

5198578499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32659200, while the sum is 65.

The square root of 5198578499 is about 72101.1684995465. The cubic root of 5198578499 is about 1732.3203296593.

The spelling of 5198578499 in words is "five billion, one hundred ninety-eight million, five hundred seventy-eight thousand, four hundred ninety-nine".