863781187368 has 32 divisors (see below), whose sum is σ = 2355766875360. Its totient is φ = 261751874880.

The previous prime is 863781187361. The next prime is 863781187369.

It is a happy number.

863781187368 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×863781187368² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a junction number, because it is equal to n+sod(n) for n = 863781187299 and 863781187308.

It is not an unprimeable number, because it can be changed into a prime (863781187361) 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, 1635948955 + ... + 1635949482.

It is an arithmetic number, because the mean of its divisors is an integer number (73617714855).

Almost surely, 2^863781187368 is an apocalyptic number.

863781187368 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

863781187368 is an abundant number, since it is smaller than the sum of its proper divisors (1491985687992).

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

863781187368 is a wasteful number, since it uses less digits than its factorization.

863781187368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3271898457 (or 3271898453 counting only the distinct ones).

The product of its digits is 65028096, while the sum is 66.

The spelling of 863781187368 in words is "eight hundred sixty-three billion, seven hundred eighty-one million, one hundred eighty-seven thousand, three hundred sixty-eight".