818351719650 has 432 divisors, whose sum is σ = 2527637845824. Its totient is φ = 196440837120.

The previous prime is 818351719609. The next prime is 818351719651. The reversal of 818351719650 is 56917153818.

It is a happy number.

It is a super-2 number, since 2×818351719650² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (818351719651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 80755984 + ... + 80766116.

It is an arithmetic number, because the mean of its divisors is an integer number (5851013532).

Almost surely, 2^818351719650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 818351719650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1263818922912).

818351719650 is an abundant number, since it is smaller than the sum of its proper divisors (1709286126174).

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

818351719650 is a wasteful number, since it uses less digits than its factorization.

818351719650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10217 (or 10183 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 54.

The spelling of 818351719650 in words is "eight hundred eighteen billion, three hundred fifty-one million, seven hundred nineteen thousand, six hundred fifty".