9479878815 has 32 divisors (see below), whose sum is σ = 16605248256. Its totient is φ = 4580040960.

The previous prime is 9479878777. The next prime is 9479878853. The reversal of 9479878815 is 5188789749.

It is an interprime number because it is at equal distance from previous prime (9479878777) and next prime (9479878853).

It is not a de Polignac number, because 9479878815 - 2¹¹ = 9479876767 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54814 + ... + 148203.

It is an arithmetic number, because the mean of its divisors is an integer number (518914008).

Almost surely, 2^9479878815 is an apocalyptic number.

9479878815 is a deficient number, since it is larger than the sum of its proper divisors (7125369441).

9479878815 is a wasteful number, since it uses less digits than its factorization.

9479878815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203319.

The product of its digits is 40642560, while the sum is 66.

The square root of 9479878815 is about 97364.6692337626. The cubic root of 9479878815 is about 2116.4154757475.

The spelling of 9479878815 in words is "nine billion, four hundred seventy-nine million, eight hundred seventy-eight thousand, eight hundred fifteen".