1220463568789 has 2 divisors, whose sum is σ = 1220463568790. Its totient is φ = 1220463568788.

The previous prime is 1220463568781. The next prime is 1220463568837. The reversal of 1220463568789 is 9878653640221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1088614696689 + 131848872100 = 1043367^2 + 363110^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220463568789 - 2³ = 1220463568781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220463568781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610231784394 + 610231784395.

It is an arithmetic number, because the mean of its divisors is an integer number (610231784395).

It is a 1-persistent number, because it is pandigital, but 2⋅1220463568789 = 2440927137578 is not.

Almost surely, 2^{1220463568789} is an apocalyptic number.

It is an amenable number.

1220463568789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220463568789 is an equidigital number, since it uses as much as digits as its factorization.

1220463568789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34836480, while the sum is 61.

The spelling of 1220463568789 in words is "one trillion, two hundred twenty billion, four hundred sixty-three million, five hundred sixty-eight thousand, seven hundred eighty-nine".