9818478685 has 8 divisors (see below), whose sum is σ = 11783411640. Its totient is φ = 7853958144.

The previous prime is 9818478667. The next prime is 9818478697. The reversal of 9818478685 is 5868748189.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2117012121 + 7701466564 = 46011^2 + 87758^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9818478685 - 2⁷ = 9818478557 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48052 + ... + 148141.

It is an arithmetic number, because the mean of its divisors is an integer number (1472926455).

Almost surely, 2^9818478685 is an apocalyptic number.

It is an amenable number.

9818478685 is a deficient number, since it is larger than the sum of its proper divisors (1964932955).

9818478685 is a wasteful number, since it uses less digits than its factorization.

9818478685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206207.

The product of its digits is 30965760, while the sum is 64.

The square root of 9818478685 is about 99088.2368649276. The cubic root of 9818478685 is about 2141.3191480283.

The spelling of 9818478685 in words is "nine billion, eight hundred eighteen million, four hundred seventy-eight thousand, six hundred eighty-five".