501265026263 has 4 divisors (see below), whose sum is σ = 501587799888. Its totient is φ = 500942252640.

The previous prime is 501265026259. The next prime is 501265026293. The reversal of 501265026263 is 362620562105.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 501265026263 - 2² = 501265026259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501265026293) 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, 161384483 + ... + 161387588.

It is an arithmetic number, because the mean of its divisors is an integer number (125396949972).

Almost surely, 2^501265026263 is an apocalyptic number.

501265026263 is a deficient number, since it is larger than the sum of its proper divisors (322773625).

501265026263 is a wasteful number, since it uses less digits than its factorization.

501265026263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322773624.

The product of its (nonzero) digits is 129600, while the sum is 38.

Adding to 501265026263 its reverse (362620562105), we get a palindrome (863885588368).

The spelling of 501265026263 in words is "five hundred one billion, two hundred sixty-five million, twenty-six thousand, two hundred sixty-three".