1791213057577 has 2 divisors, whose sum is σ = 1791213057578. Its totient is φ = 1791213057576.

The previous prime is 1791213057461. The next prime is 1791213057661. The reversal of 1791213057577 is 7757503121971.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1605620971161 + 185592086416 = 1267131^2 + 430804^2 .

It is a cyclic number.

It is not a de Polignac number, because 1791213057577 - 2¹⁹ = 1791212533289 is a prime.

It is a super-2 number, since 2×1791213057577² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1791213057077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 895606528788 + 895606528789.

It is an arithmetic number, because the mean of its divisors is an integer number (895606528789).

Almost surely, 2^{1791213057577} is an apocalyptic number.

It is an amenable number.

1791213057577 is a deficient number, since it is larger than the sum of its proper divisors (1).

1791213057577 is an equidigital number, since it uses as much as digits as its factorization.

1791213057577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3241350, while the sum is 55.

The spelling of 1791213057577 in words is "one trillion, seven hundred ninety-one billion, two hundred thirteen million, fifty-seven thousand, five hundred seventy-seven".