1331594894857 has 2 divisors, whose sum is σ = 1331594894858. Its totient is φ = 1331594894856.

The previous prime is 1331594894797. The next prime is 1331594894879. The reversal of 1331594894857 is 7584984951331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 967972628736 + 363622266121 = 983856^2 + 603011^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331594894857 - 2²³ = 1331586506249 is a prime.

It is a super-3 number, since 3×1331594894857³ (a number of 37 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1331594894792 and 1331594894801.

It is not a weakly prime, because it can be changed into another prime (1331594894557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665797447428 + 665797447429.

It is an arithmetic number, because the mean of its divisors is an integer number (665797447429).

Almost surely, 2^{1331594894857} is an apocalyptic number.

It is an amenable number.

1331594894857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331594894857 is an equidigital number, since it uses as much as digits as its factorization.

1331594894857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 130636800, while the sum is 67.

The spelling of 1331594894857 in words is "one trillion, three hundred thirty-one billion, five hundred ninety-four million, eight hundred ninety-four thousand, eight hundred fifty-seven".