78069390368 has 18 divisors (see below), whose sum is σ = 153702224109. Its totient is φ = 39033904896.

The previous prime is 78069390281. The next prime is 78069390389. The reversal of 78069390368 is 86309396087.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 68889451024 + 9179939344 = 262468^2 + 95812^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=197572.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1555880 + ... + 1605272.

Almost surely, 2^78069390368 is an apocalyptic number.

It is an amenable number.

78069390368 is a deficient number, since it is larger than the sum of its proper divisors (75632833741).

78069390368 is an frugal number, since it uses more digits than its factorization.

78069390368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98796 (or 49395 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 59.

The spelling of 78069390368 in words is "seventy-eight billion, sixty-nine million, three hundred ninety thousand, three hundred sixty-eight".