1915728182220 has 96 divisors (see below), whose sum is σ = 5416870717440. Its totient is φ = 505830631680.

The previous prime is 1915728182219. The next prime is 1915728182231. The reversal of 1915728182220 is 222818275191.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1915728182220.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56276605 + ... + 56310635.

It is an arithmetic number, because the mean of its divisors is an integer number (56425736640).

Almost surely, 2^{1915728182220} is an apocalyptic number.

1915728182220 is a gapful number since it is divisible by the number (10) 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 1915728182220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2708435358720).

1915728182220 is an abundant number, since it is smaller than the sum of its proper divisors (3501142535220).

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

1915728182220 is a wasteful number, since it uses less digits than its factorization.

1915728182220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43255 (or 43253 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 48.

The spelling of 1915728182220 in words is "one trillion, nine hundred fifteen billion, seven hundred twenty-eight million, one hundred eighty-two thousand, two hundred twenty".