1220773457593 has 2 divisors, whose sum is σ = 1220773457594. Its totient is φ = 1220773457592.

The previous prime is 1220773457581. The next prime is 1220773457599. The reversal of 1220773457593 is 3957543770221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1189216422144 + 31557035449 = 1090512^2 + 177643^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220773457593 - 2²¹ = 1220771360441 is a prime.

It is a super-3 number, since 3×1220773457593³ (a number of 37 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1220773457599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610386728796 + 610386728797.

It is an arithmetic number, because the mean of its divisors is an integer number (610386728797).

Almost surely, 2^{1220773457593} is an apocalyptic number.

It is an amenable number.

1220773457593 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220773457593 is an equidigital number, since it uses as much as digits as its factorization.

1220773457593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11113200, while the sum is 55.

The spelling of 1220773457593 in words is "one trillion, two hundred twenty billion, seven hundred seventy-three million, four hundred fifty-seven thousand, five hundred ninety-three".