220520280356178 has 128 divisors (see below), whose sum is σ = 520371637632000. Its totient is φ = 61569544055040.

The previous prime is 220520280356177. The next prime is 220520280356263. The reversal of 220520280356178 is 871653082025022.

It is a self number, because there is not a number n which added to its sum of digits gives 220520280356178.

It is not an unprimeable number, because it can be changed into a prime (220520280356177) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 106103793 + ... + 108162171.

It is an arithmetic number, because the mean of its divisors is an integer number (4065403419000).

Almost surely, 2^{220520280356178} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220520280356178, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260185818816000).

220520280356178 is an abundant number, since it is smaller than the sum of its proper divisors (299851357275822).

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

220520280356178 is a wasteful number, since it uses less digits than its factorization.

220520280356178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2060760.

The product of its (nonzero) digits is 3225600, while the sum is 51.

The spelling of 220520280356178 in words is "two hundred twenty trillion, five hundred twenty billion, two hundred eighty million, three hundred fifty-six thousand, one hundred seventy-eight".