220506786765 has 12 divisors (see below), whose sum is σ = 382211763804. Its totient is φ = 117603619584.

The previous prime is 220506786739. The next prime is 220506786781. The reversal of 220506786765 is 567687605022.

220506786765 is a `hidden beast` number, since 2 + 2 + 0 + 506 + 78 + 6 + 7 + 65 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 176143053636 + 44363733129 = 419694^2 + 210627^2 .

It is not a de Polignac number, because 220506786765 - 2⁵ = 220506786733 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2450075364 + ... + 2450075453.

It is an arithmetic number, because the mean of its divisors is an integer number (31850980317).

Almost surely, 2^220506786765 is an apocalyptic number.

It is an amenable number.

220506786765 is a deficient number, since it is larger than the sum of its proper divisors (161704977039).

220506786765 is a wasteful number, since it uses less digits than its factorization.

220506786765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4900150828 (or 4900150825 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 54.

The spelling of 220506786765 in words is "two hundred twenty billion, five hundred six million, seven hundred eighty-six thousand, seven hundred sixty-five".