263866063851252 has 144 divisors (see below), whose sum is σ = 703024325129280. Its totient is φ = 85541087584512.

The previous prime is 263866063851211. The next prime is 263866063851259. The reversal of 263866063851252 is 252158360668362.

263866063851252 is a `hidden beast` number, since 2 + 6 + 3 + 8 + 6 + 6 + 0 + 63 + 8 + 512 + 52 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 263866063851252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263866063851259) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 251594818 + ... + 252641414.

Almost surely, 2^{263866063851252} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 263866063851252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (351512162564640).

263866063851252 is an abundant number, since it is smaller than the sum of its proper divisors (439158261278028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

263866063851252 is a wasteful number, since it uses less digits than its factorization.

263866063851252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047119 (or 1046878 counting only the distinct ones).

The product of its (nonzero) digits is 149299200, while the sum is 63.

The spelling of 263866063851252 in words is "two hundred sixty-three trillion, eight hundred sixty-six billion, sixty-three million, eight hundred fifty-one thousand, two hundred fifty-two".