263703580073 has 8 divisors (see below), whose sum is σ = 266476621992. Its totient is φ = 260931649536.

The previous prime is 263703580051. The next prime is 263703580093. The reversal of 263703580073 is 370085307362.

It can be written as a sum of positive squares in 4 ways, for example, as 3712708624 + 259990871449 = 60932^2 + 509893^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 263703580073 - 2¹⁸ = 263703317929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263703580093) 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 in 7 ways as a sum of consecutive naturals, for example, 203561 + ... + 754217.

It is an arithmetic number, because the mean of its divisors is an integer number (33309577749).

Almost surely, 2^263703580073 is an apocalyptic number.

It is an amenable number.

263703580073 is a deficient number, since it is larger than the sum of its proper divisors (2773041919).

263703580073 is an equidigital number, since it uses as much as digits as its factorization.

263703580073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555691.

The product of its (nonzero) digits is 635040, while the sum is 44.

The spelling of 263703580073 in words is "two hundred sixty-three billion, seven hundred three million, five hundred eighty thousand, seventy-three".