22780720889 has 2 divisors, whose sum is σ = 22780720890. Its totient is φ = 22780720888.

The previous prime is 22780720847. The next prime is 22780720927. The reversal of 22780720889 is 98802708722.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20108658025 + 2672062864 = 141805^2 + 51692^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22780720889 is a prime.

It is a super-2 number, since 2×22780720889² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22780720889.

It is not a weakly prime, because it can be changed into another prime (22780720819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11390360444 + 11390360445.

It is an arithmetic number, because the mean of its divisors is an integer number (11390360445).

Almost surely, 2^22780720889 is an apocalyptic number.

It is an amenable number.

22780720889 is a deficient number, since it is larger than the sum of its proper divisors (1).

22780720889 is an equidigital number, since it uses as much as digits as its factorization.

22780720889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1806336, while the sum is 53.

The spelling of 22780720889 in words is "twenty-two billion, seven hundred eighty million, seven hundred twenty thousand, eight hundred eighty-nine".