220578728435824 has 80 divisors (see below), whose sum is σ = 470110513680000. Its totient is φ = 99429255855360.

The previous prime is 220578728435803. The next prime is 220578728435837. The reversal of 220578728435824 is 428534827875022.

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 220578728435824.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9438367 + ... + 23026945.

It is an arithmetic number, because the mean of its divisors is an integer number (5876381421000).

Almost surely, 2^{220578728435824} 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 220578728435824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235055256840000).

220578728435824 is an abundant number, since it is smaller than the sum of its proper divisors (249531785244176).

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

220578728435824 is a wasteful number, since it uses less digits than its factorization.

220578728435824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13589366 (or 13589360 counting only the distinct ones).

The product of its (nonzero) digits is 481689600, while the sum is 67.

The spelling of 220578728435824 in words is "two hundred twenty trillion, five hundred seventy-eight billion, seven hundred twenty-eight million, four hundred thirty-five thousand, eight hundred twenty-four".