263211944878081 has 8 divisors (see below), whose sum is σ = 263901271703328. Its totient is φ = 262523241036000.

The previous prime is 263211944878031. The next prime is 263211944878199. The reversal of 263211944878081 is 180878449112362.

263211944878081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 263211944878081 - 2¹³ = 263211944869889 is a prime.

It is a super-2 number, since 2×263211944878081² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263211944878031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154899675 + ... + 156589696.

It is an arithmetic number, because the mean of its divisors is an integer number (32987658962916).

Almost surely, 2^{263211944878081} is an apocalyptic number.

It is an amenable number.

263211944878081 is a deficient number, since it is larger than the sum of its proper divisors (689326825247).

263211944878081 is a wasteful number, since it uses less digits than its factorization.

263211944878081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311491583.

The product of its (nonzero) digits is 37158912, while the sum is 64.

The spelling of 263211944878081 in words is "two hundred sixty-three trillion, two hundred eleven billion, nine hundred forty-four million, eight hundred seventy-eight thousand, eighty-one".