78876315437065 has 4 divisors (see below), whose sum is σ = 94651578524484. Its totient is φ = 63101052349648.

The previous prime is 78876315437027. The next prime is 78876315437077. The reversal of 78876315437065 is 56073451367887.

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 18161098189056 + 60715217248009 = 4261584^2 + 7791997^2 .

It is a cyclic number.

It is not a de Polignac number, because 78876315437065 - 2⁷ = 78876315436937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78876315436985 and 78876315437003.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7887631543702 + ... + 7887631543711.

It is an arithmetic number, because the mean of its divisors is an integer number (23662894631121).

Almost surely, 2^{78876315437065} is an apocalyptic number.

It is an amenable number.

78876315437065 is a deficient number, since it is larger than the sum of its proper divisors (15775263087419).

78876315437065 is a wasteful number, since it uses less digits than its factorization.

78876315437065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15775263087418.

The product of its (nonzero) digits is 711244800, while the sum is 70.

The spelling of 78876315437065 in words is "seventy-eight trillion, eight hundred seventy-six billion, three hundred fifteen million, four hundred thirty-seven thousand, sixty-five".