818648815 has 8 divisors (see below), whose sum is σ = 996215328. Its totient is φ = 645694560.

The previous prime is 818648807. The next prime is 818648819. The reversal of 818648815 is 518846818.

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

It is not a de Polignac number, because 818648815 - 2³ = 818648807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818648819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1152672 + ... + 1153381.

It is an arithmetic number, because the mean of its divisors is an integer number (124526916).

Almost surely, 2^818648815 is an apocalyptic number.

818648815 is a deficient number, since it is larger than the sum of its proper divisors (177566513).

818648815 is a wasteful number, since it uses less digits than its factorization.

818648815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2306129.

The product of its digits is 491520, while the sum is 49.

The square root of 818648815 is about 28612.0396861181. The cubic root of 818648815 is about 935.4757756663.

The spelling of 818648815 in words is "eight hundred eighteen million, six hundred forty-eight thousand, eight hundred fifteen".