863879414845 has 4 divisors (see below), whose sum is σ = 1036655297820. Its totient is φ = 691103531872.

The previous prime is 863879414821. The next prime is 863879414863. The reversal of 863879414845 is 548414978368.

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

It can be written as a sum of positive squares in 2 ways, for example, as 247117357881 + 616762056964 = 497109^2 + 785342^2 .

It is a cyclic number.

It is not a de Polignac number, because 863879414845 - 2¹⁵ = 863879382077 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86387941480 + ... + 86387941489.

It is an arithmetic number, because the mean of its divisors is an integer number (259163824455).

Almost surely, 2^863879414845 is an apocalyptic number.

It is an amenable number.

863879414845 is a deficient number, since it is larger than the sum of its proper divisors (172775882975).

863879414845 is a wasteful number, since it uses less digits than its factorization.

863879414845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172775882974.

The product of its digits is 185794560, while the sum is 67.

The spelling of 863879414845 in words is "eight hundred sixty-three billion, eight hundred seventy-nine million, four hundred fourteen thousand, eight hundred forty-five".