263885517213 has 8 divisors (see below), whose sum is σ = 351945296448. Its totient is φ = 175874708064.

The previous prime is 263885517173. The next prime is 263885517229. The reversal of 263885517213 is 312715588362.

It is a happy number.

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

It is not a de Polignac number, because 263885517213 - 2²⁰ = 263884468637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263885517613) 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, 12229945 + ... + 12251502.

It is an arithmetic number, because the mean of its divisors is an integer number (43993162056).

Almost surely, 2^263885517213 is an apocalyptic number.

It is an amenable number.

263885517213 is a deficient number, since it is larger than the sum of its proper divisors (88059779235).

263885517213 is a wasteful number, since it uses less digits than its factorization.

263885517213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24485043.

The product of its digits is 2419200, while the sum is 51.

The spelling of 263885517213 in words is "two hundred sixty-three billion, eight hundred eighty-five million, five hundred seventeen thousand, two hundred thirteen".