1818195328872 has 192 divisors, whose sum is σ = 5506241045760. Its totient is φ = 558756921600.

The previous prime is 1818195328843. The next prime is 1818195328903. The reversal of 1818195328872 is 2788235918181.

1818195328872 is a `hidden beast` number, since 1 + 8 + 1 + 8 + 19 + 532 + 8 + 87 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20704497 + ... + 20792127.

It is an arithmetic number, because the mean of its divisors is an integer number (28678338780).

Almost surely, 2^{1818195328872} is an apocalyptic number.

1818195328872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1818195328872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2753120522880).

1818195328872 is an abundant number, since it is smaller than the sum of its proper divisors (3688045716888).

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

1818195328872 is a wasteful number, since it uses less digits than its factorization.

1818195328872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88486 (or 88470 counting only the distinct ones).

The product of its digits is 15482880, while the sum is 63.

The spelling of 1818195328872 in words is "one trillion, eight hundred eighteen billion, one hundred ninety-five million, three hundred twenty-eight thousand, eight hundred seventy-two".