1165570087817 has 2 divisors, whose sum is σ = 1165570087818. Its totient is φ = 1165570087816.

The previous prime is 1165570087727. The next prime is 1165570087823. The reversal of 1165570087817 is 7187800755611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 688719071881 + 476851015936 = 829891^2 + 690544^2 .

It is a cyclic number.

It is not a de Polignac number, because 1165570087817 - 2²⁰ = 1165569039241 is a prime.

It is a super-2 number, since 2×1165570087817² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1165570087417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582785043908 + 582785043909.

It is an arithmetic number, because the mean of its divisors is an integer number (582785043909).

Almost surely, 2^{1165570087817} is an apocalyptic number.

It is an amenable number.

1165570087817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165570087817 is an equidigital number, since it uses as much as digits as its factorization.

1165570087817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3292800, while the sum is 56.

The spelling of 1165570087817 in words is "one trillion, one hundred sixty-five billion, five hundred seventy million, eighty-seven thousand, eight hundred seventeen".