818621792016 has 120 divisors (see below), whose sum is σ = 2460967961184. Its totient is φ = 233803906560.

The previous prime is 818621791963. The next prime is 818621792089. The reversal of 818621792016 is 610297126818.

It is a super-2 number, since 2×818621792016² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 818621792016.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6316831 + ... + 6445121.

Almost surely, 2^818621792016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 818621792016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1230483980592).

818621792016 is an abundant number, since it is smaller than the sum of its proper divisors (1642346169168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

818621792016 is a wasteful number, since it uses less digits than its factorization.

818621792016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131029 (or 131016 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 51.

The spelling of 818621792016 in words is "eight hundred eighteen billion, six hundred twenty-one million, seven hundred ninety-two thousand, sixteen".