918000000815 has 4 divisors (see below), whose sum is σ = 1101600000984. Its totient is φ = 734400000648.

The previous prime is 918000000793. The next prime is 918000000851. The reversal of 918000000815 is 518000000819.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 918000000815 - 2⁶ = 918000000751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91800000077 + ... + 91800000086.

It is an arithmetic number, because the mean of its divisors is an integer number (275400000246).

Almost surely, 2^918000000815 is an apocalyptic number.

918000000815 is a deficient number, since it is larger than the sum of its proper divisors (183600000169).

918000000815 is a wasteful number, since it uses less digits than its factorization.

918000000815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183600000168.

The product of its (nonzero) digits is 2880, while the sum is 32.

The spelling of 918000000815 in words is "nine hundred eighteen billion, eight hundred fifteen", and thus it is an aban number.