78612205847 has 8 divisors (see below), whose sum is σ = 89970689952. Its totient is φ = 67285764000.

The previous prime is 78612205831. The next prime is 78612205849. The reversal of 78612205847 is 74850221687.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78612205847 - 2⁴ = 78612205831 is a prime.

It is a super-2 number, since 2×78612205847² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78612205795 and 78612205804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78612205849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8005304 + ... + 8015117.

It is an arithmetic number, because the mean of its divisors is an integer number (11246336244).

Almost surely, 2^78612205847 is an apocalyptic number.

78612205847 is a deficient number, since it is larger than the sum of its proper divisors (11358484105).

78612205847 is a wasteful number, since it uses less digits than its factorization.

78612205847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16021129.

The product of its (nonzero) digits is 1505280, while the sum is 50.

The spelling of 78612205847 in words is "seventy-eight billion, six hundred twelve million, two hundred five thousand, eight hundred forty-seven".