863684450811 has 32 divisors (see below), whose sum is σ = 1574809259520. Its totient is φ = 455569818912.

The previous prime is 863684450791. The next prime is 863684450813. The reversal of 863684450811 is 118054486368.

863684450811 is a `hidden beast` number, since 8 + 6 + 36 + 84 + 450 + 81 + 1 = 666.

It is not a de Polignac number, because 863684450811 - 2¹¹ = 863684448763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (863684450813) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 175757505 + ... + 175762418.

It is an arithmetic number, because the mean of its divisors is an integer number (49212789360).

Almost surely, 2^863684450811 is an apocalyptic number.

863684450811 is a deficient number, since it is larger than the sum of its proper divisors (711124808709).

863684450811 is a wasteful number, since it uses less digits than its factorization.

863684450811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351519952 (or 351519946 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 54.

The spelling of 863684450811 in words is "eight hundred sixty-three billion, six hundred eighty-four million, four hundred fifty thousand, eight hundred eleven".