220786071561 has 12 divisors (see below), whose sum is σ = 347905325040. Its totient is φ = 133809740280.

The previous prime is 220786071559. The next prime is 220786071581. The reversal of 220786071561 is 165170687022.

220786071561 is a `hidden beast` number, since 2 + 2 + 0 + 7 + 86 + 0 + 7 + 1 + 561 = 666.

It is not a de Polignac number, because 220786071561 - 2¹ = 220786071559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220786071581) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1115081071 + ... + 1115081268.

It is an arithmetic number, because the mean of its divisors is an integer number (28992110420).

Almost surely, 2^220786071561 is an apocalyptic number.

It is an amenable number.

220786071561 is a deficient number, since it is larger than the sum of its proper divisors (127119253479).

220786071561 is a wasteful number, since it uses less digits than its factorization.

220786071561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2230162356 (or 2230162353 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The spelling of 220786071561 in words is "two hundred twenty billion, seven hundred eighty-six million, seventy-one thousand, five hundred sixty-one".