2168573557 has 2 divisors, whose sum is σ = 2168573558. Its totient is φ = 2168573556.

The previous prime is 2168573543. The next prime is 2168573591. The reversal of 2168573557 is 7553758612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2112413521 + 56160036 = 45961^2 + 7494^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2168573557 is a prime.

It is a super-2 number, since 2×2168573557² = 9405422544239264498, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2168573557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2168573507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1084286778 + 1084286779.

It is an arithmetic number, because the mean of its divisors is an integer number (1084286779).

Almost surely, 2^2168573557 is an apocalyptic number.

It is an amenable number.

2168573557 is a deficient number, since it is larger than the sum of its proper divisors (1).

2168573557 is an equidigital number, since it uses as much as digits as its factorization.

2168573557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1764000, while the sum is 49.

The square root of 2168573557 is about 46567.9455956562. The cubic root of 2168573557 is about 1294.3688495318.

The spelling of 2168573557 in words is "two billion, one hundred sixty-eight million, five hundred seventy-three thousand, five hundred fifty-seven".