220267738565989 has 2 divisors, whose sum is σ = 220267738565990. Its totient is φ = 220267738565988.

The previous prime is 220267738565977. The next prime is 220267738566019. The reversal of 220267738565989 is 989565837762022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 206093530097764 + 14174208468225 = 14355958^2 + 3764865^2 .

It is a cyclic number.

It is not a de Polignac number, because 220267738565989 - 2⁵ = 220267738565957 is a prime.

It is a super-2 number, since 2×220267738565989² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220267238565989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110133869282994 + 110133869282995.

It is an arithmetic number, because the mean of its divisors is an integer number (110133869282995).

Almost surely, 2^{220267738565989} is an apocalyptic number.

It is an amenable number.

220267738565989 is a deficient number, since it is larger than the sum of its proper divisors (1).

220267738565989 is an equidigital number, since it uses as much as digits as its factorization.

220267738565989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5486745600, while the sum is 79.

The spelling of 220267738565989 in words is "two hundred twenty trillion, two hundred sixty-seven billion, seven hundred thirty-eight million, five hundred sixty-five thousand, nine hundred eighty-nine".