863668145431 has 36 divisors (see below), whose sum is σ = 1088122615992. Its totient is φ = 683203719744.

The previous prime is 863668145393. The next prime is 863668145443. The reversal of 863668145431 is 134541866368.

It is a happy number.

It is not a de Polignac number, because 863668145431 - 2¹¹ = 863668143383 is a prime.

It is a super-2 number, since 2×863668145431² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863668145531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 65686600 + ... + 65699746.

It is an arithmetic number, because the mean of its divisors is an integer number (30225628222).

Almost surely, 2^863668145431 is an apocalyptic number.

863668145431 is a deficient number, since it is larger than the sum of its proper divisors (224454470561).

863668145431 is a wasteful number, since it uses less digits than its factorization.

863668145431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21120 (or 21100 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 55.

The spelling of 863668145431 in words is "eight hundred sixty-three billion, six hundred sixty-eight million, one hundred forty-five thousand, four hundred thirty-one".