863078478547 has 4 divisors (see below), whose sum is σ = 863358429240. Its totient is φ = 862798527856.

The previous prime is 863078478491. The next prime is 863078478553. The reversal of 863078478547 is 745874870368.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-863078478547 is a prime.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (863078479547) 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 3 ways as a sum of consecutive naturals, for example, 139970722 + ... + 139976887.

It is an arithmetic number, because the mean of its divisors is an integer number (215839607310).

Almost surely, 2^863078478547 is an apocalyptic number.

863078478547 is a deficient number, since it is larger than the sum of its proper divisors (279950693).

863078478547 is a wasteful number, since it uses less digits than its factorization.

863078478547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279950692.

The product of its (nonzero) digits is 252887040, while the sum is 67.

The spelling of 863078478547 in words is "eight hundred sixty-three billion, seventy-eight million, four hundred seventy-eight thousand, five hundred forty-seven".