78394603705 has 16 divisors (see below), whose sum is σ = 105128731008. Its totient is φ = 55623664000.

The previous prime is 78394603697. The next prime is 78394603739. The reversal of 78394603705 is 50730649387.

It is a happy number.

It is not a de Polignac number, because 78394603705 - 2³ = 78394603697 is a prime.

It is a super-2 number, since 2×78394603705² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 17380141 + ... + 17384650.

It is an arithmetic number, because the mean of its divisors is an integer number (6570545688).

Almost surely, 2^78394603705 is an apocalyptic number.

It is an amenable number.

78394603705 is a deficient number, since it is larger than the sum of its proper divisors (26734127303).

78394603705 is a wasteful number, since it uses less digits than its factorization.

78394603705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34764848.

The product of its (nonzero) digits is 3810240, while the sum is 52.

The spelling of 78394603705 in words is "seventy-eight billion, three hundred ninety-four million, six hundred three thousand, seven hundred five".