6198778915 has 16 divisors (see below), whose sum is σ = 8528532480. Its totient is φ = 4236916320.

The previous prime is 6198778909. The next prime is 6198778931. The reversal of 6198778915 is 5198778916.

It is not a de Polignac number, because 6198778915 - 2¹³ = 6198770723 is a prime.

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, 273855 + ... + 295624.

It is an arithmetic number, because the mean of its divisors is an integer number (533033280).

Almost surely, 2^6198778915 is an apocalyptic number.

6198778915 is a deficient number, since it is larger than the sum of its proper divisors (2329753565).

6198778915 is a wasteful number, since it uses less digits than its factorization.

6198778915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569802.

The product of its digits is 7620480, while the sum is 61.

The square root of 6198778915 is about 78732.3244607956. The cubic root of 6198778915 is about 1836.9699375949.

Subtracting from 6198778915 its reverse (5198778916), we obtain a palindrome (999999999).

The spelling of 6198778915 in words is "six billion, one hundred ninety-eight million, seven hundred seventy-eight thousand, nine hundred fifteen".