220663020155781 has 8 divisors (see below), whose sum is σ = 336248411665984. Its totient is φ = 126093154374720.

The previous prime is 220663020155663. The next prime is 220663020155819. The reversal of 220663020155781 is 187551020366022.

220663020155781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 220663020155781 - 2⁹ = 220663020155269 is a prime.

It is a super-2 number, since 2×220663020155781² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220663020155781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220663020151781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5253881432260 + ... + 5253881432301.

It is an arithmetic number, because the mean of its divisors is an integer number (42031051458248).

Almost surely, 2^{220663020155781} is an apocalyptic number.

220663020155781 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

220663020155781 is a deficient number, since it is larger than the sum of its proper divisors (115585391510203).

220663020155781 is a wasteful number, since it uses less digits than its factorization.

220663020155781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10507762864571.

The product of its (nonzero) digits is 1209600, while the sum is 48.

The spelling of 220663020155781 in words is "two hundred twenty trillion, six hundred sixty-three billion, twenty million, one hundred fifty-five thousand, seven hundred eighty-one".