78535481325205 has 4 divisors (see below), whose sum is σ = 94242577590252. Its totient is φ = 62828385060160.

The previous prime is 78535481325187. The next prime is 78535481325229. The reversal of 78535481325205 is 50252318453587.

It is a happy number.

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 14903622391441 + 63631858933764 = 3860521^2 + 7976958^2 .

It is not a de Polignac number, because 78535481325205 - 2⁵ = 78535481325173 is a prime.

It is a Smith number, since the sum of its digits (58) 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 a self number, because there is not a number n which added to its sum of digits gives 78535481325205.

It is a congruent number.

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, 7853548132516 + ... + 7853548132525.

It is an arithmetic number, because the mean of its divisors is an integer number (23560644397563).

Almost surely, 2^{78535481325205} is an apocalyptic number.

It is an amenable number.

78535481325205 is a deficient number, since it is larger than the sum of its proper divisors (15707096265047).

78535481325205 is a wasteful number, since it uses less digits than its factorization.

78535481325205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15707096265046.

The product of its (nonzero) digits is 40320000, while the sum is 58.

The spelling of 78535481325205 in words is "seventy-eight trillion, five hundred thirty-five billion, four hundred eighty-one million, three hundred twenty-five thousand, two hundred five".