78539711305 has 16 divisors (see below), whose sum is σ = 102913524288. Its totient is φ = 57065400000.

The previous prime is 78539711291. The next prime is 78539711353. The reversal of 78539711305 is 50311793587.

It is a happy number.

It is not a de Polignac number, because 78539711305 - 2¹¹ = 78539709257 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 621546 + ... + 737155.

It is an arithmetic number, because the mean of its divisors is an integer number (6432095268).

Almost surely, 2^78539711305 is an apocalyptic number.

It is an amenable number.

78539711305 is a deficient number, since it is larger than the sum of its proper divisors (24373812983).

78539711305 is a wasteful number, since it uses less digits than its factorization.

78539711305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1359768.

The product of its (nonzero) digits is 793800, while the sum is 49.

The spelling of 78539711305 in words is "seventy-eight billion, five hundred thirty-nine million, seven hundred eleven thousand, three hundred five".