220890445777 has 2 divisors, whose sum is σ = 220890445778. Its totient is φ = 220890445776.

The previous prime is 220890445697. The next prime is 220890445819. The reversal of 220890445777 is 777544098022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158602266001 + 62288179776 = 398249^2 + 249576^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220890445777 is a prime.

It is a super-3 number, since 3×220890445777³ (a number of 35 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (220890443777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110445222888 + 110445222889.

It is an arithmetic number, because the mean of its divisors is an integer number (110445222889).

Almost surely, 2^220890445777 is an apocalyptic number.

It is an amenable number.

220890445777 is a deficient number, since it is larger than the sum of its proper divisors (1).

220890445777 is an equidigital number, since it uses as much as digits as its factorization.

220890445777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7902720, while the sum is 55.

The spelling of 220890445777 in words is "two hundred twenty billion, eight hundred ninety million, four hundred forty-five thousand, seven hundred seventy-seven".