863640596861 has 8 divisors (see below), whose sum is σ = 1013693982720. Its totient is φ = 720256250448.

The previous prime is 863640596837. The next prime is 863640596881. The reversal of 863640596861 is 168695046368.

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 863640596861 - 2¹⁰ = 863640595837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 863640596794 and 863640596803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863640596881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1667259581 + ... + 1667260098.

It is an arithmetic number, because the mean of its divisors is an integer number (126711747840).

Almost surely, 2^863640596861 is an apocalyptic number.

It is an amenable number.

863640596861 is a deficient number, since it is larger than the sum of its proper divisors (150053385859).

863640596861 is a wasteful number, since it uses less digits than its factorization.

863640596861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3334519723.

The product of its (nonzero) digits is 44789760, while the sum is 62.

The spelling of 863640596861 in words is "eight hundred sixty-three billion, six hundred forty million, five hundred ninety-six thousand, eight hundred sixty-one".