78560803505 has 4 divisors (see below), whose sum is σ = 94272964212. Its totient is φ = 62848642800.

The previous prime is 78560803487. The next prime is 78560803523. The reversal of 78560803505 is 50530806587.

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

It is an interprime number because it is at equal distance from previous prime (78560803487) and next prime (78560803523).

It can be written as a sum of positive squares in 2 ways, for example, as 8365480369 + 70195323136 = 91463^2 + 264944^2 .

It is not a de Polignac number, because 78560803505 - 2⁸ = 78560803249 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 78560803505.

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, 7856080346 + ... + 7856080355.

It is an arithmetic number, because the mean of its divisors is an integer number (23568241053).

Almost surely, 2^78560803505 is an apocalyptic number.

It is an amenable number.

78560803505 is a deficient number, since it is larger than the sum of its proper divisors (15712160707).

78560803505 is a wasteful number, since it uses less digits than its factorization.

78560803505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15712160706.

The product of its (nonzero) digits is 1008000, while the sum is 47.

The spelling of 78560803505 in words is "seventy-eight billion, five hundred sixty million, eight hundred three thousand, five hundred five".