263221317476564 has 18 divisors (see below), whose sum is σ = 469492561745550. Its totient is φ = 129127438756576.

The previous prime is 263221317476563. The next prime is 263221317476591. The reversal of 263221317476564 is 465674713122362.

263221317476564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 140088339435664 + 123132978040900 = 11835892^2 + 11096530^2 .

It is a super-3 number, since 3×263221317476564³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263221317476563) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11713290539 + ... + 11713313010.

It is an arithmetic number, because the mean of its divisors is an integer number (26082920096975).

Almost surely, 2^{263221317476564} is an apocalyptic number.

It is an amenable number.

263221317476564 is a deficient number, since it is larger than the sum of its proper divisors (206271244268986).

263221317476564 is a wasteful number, since it uses less digits than its factorization.

263221317476564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23426603659 (or 23426603604 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 59.

The spelling of 263221317476564 in words is "two hundred sixty-three trillion, two hundred twenty-one billion, three hundred seventeen million, four hundred seventy-six thousand, five hundred sixty-four".