263044421061 has 4 divisors (see below), whose sum is σ = 350725894752. Its totient is φ = 175362947372.

The previous prime is 263044420967. The next prime is 263044421069. The reversal of 263044421061 is 160124440362.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 263044421061 - 2²⁶ = 262977312197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263044421069) 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 3 ways as a sum of consecutive naturals, for example, 43840736841 + ... + 43840736846.

It is an arithmetic number, because the mean of its divisors is an integer number (87681473688).

Almost surely, 2^263044421061 is an apocalyptic number.

It is an amenable number.

263044421061 is a deficient number, since it is larger than the sum of its proper divisors (87681473691).

263044421061 is an equidigital number, since it uses as much as digits as its factorization.

263044421061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87681473690.

The product of its (nonzero) digits is 27648, while the sum is 33.

The spelling of 263044421061 in words is "two hundred sixty-three billion, forty-four million, four hundred twenty-one thousand, sixty-one".