1320555450077 has 2 divisors, whose sum is σ = 1320555450078. Its totient is φ = 1320555450076.

The previous prime is 1320555449989. The next prime is 1320555450107. The reversal of 1320555450077 is 7700545550231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1320554915716 + 534361 = 1149154^2 + 731^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320555450077 - 2¹⁴ = 1320555433693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320555452077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660277725038 + 660277725039.

It is an arithmetic number, because the mean of its divisors is an integer number (660277725039).

Almost surely, 2^{1320555450077} is an apocalyptic number.

It is an amenable number.

1320555450077 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320555450077 is an equidigital number, since it uses as much as digits as its factorization.

1320555450077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 735000, while the sum is 44.

The spelling of 1320555450077 in words is "one trillion, three hundred twenty billion, five hundred fifty-five million, four hundred fifty thousand, seventy-seven".