263984313577 has 2 divisors, whose sum is σ = 263984313578. Its totient is φ = 263984313576.

The previous prime is 263984313563. The next prime is 263984313613. The reversal of 263984313577 is 775313489362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 174911314176 + 89072999401 = 418224^2 + 298451^2 .

It is a cyclic number.

It is not a de Polignac number, because 263984313577 - 2¹⁵ = 263984280809 is a prime.

It is not a weakly prime, because it can be changed into another prime (263984313277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131992156788 + 131992156789.

It is an arithmetic number, because the mean of its divisors is an integer number (131992156789).

Almost surely, 2^263984313577 is an apocalyptic number.

It is an amenable number.

263984313577 is a deficient number, since it is larger than the sum of its proper divisors (1).

263984313577 is an equidigital number, since it uses as much as digits as its factorization.

263984313577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22861440, while the sum is 58.

The spelling of 263984313577 in words is "two hundred sixty-three billion, nine hundred eighty-four million, three hundred thirteen thousand, five hundred seventy-seven".