263198375853757 has 2 divisors, whose sum is σ = 263198375853758. Its totient is φ = 263198375853756.

The previous prime is 263198375853719. The next prime is 263198375853797. The reversal of 263198375853757 is 757358573891362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138964747765561 + 124233628088196 = 11788331^2 + 11146014^2 .

It is a cyclic number.

It is not a de Polignac number, because 263198375853757 - 2²³ = 263198367465149 is a prime.

It is a super-3 number, since 3×263198375853757³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263198375853797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131599187926878 + 131599187926879.

It is an arithmetic number, because the mean of its divisors is an integer number (131599187926879).

Almost surely, 2^{263198375853757} is an apocalyptic number.

It is an amenable number.

263198375853757 is a deficient number, since it is larger than the sum of its proper divisors (1).

263198375853757 is an equidigital number, since it uses as much as digits as its factorization.

263198375853757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8001504000, while the sum is 79.

The spelling of 263198375853757 in words is "two hundred sixty-three trillion, one hundred ninety-eight billion, three hundred seventy-five million, eight hundred fifty-three thousand, seven hundred fifty-seven".