78385246696 has 8 divisors (see below), whose sum is σ = 146972337570. Its totient is φ = 39192623344.

The previous prime is 78385246657. The next prime is 78385246711. The reversal of 78385246696 is 69664258387.

It can be written as a sum of positive squares in only one way, i.e., 75553516900 + 2831729796 = 274870^2 + 53214^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×78385246696² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (64) coincides with the sum of the digits of its distinct prime factors.

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 as a sum of consecutive naturals, namely, 4899077911 + ... + 4899077926.

Almost surely, 2^78385246696 is an apocalyptic number.

It is an amenable number.

78385246696 is a deficient number, since it is larger than the sum of its proper divisors (68587090874).

78385246696 is a wasteful number, since it uses less digits than its factorization.

78385246696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9798155843 (or 9798155839 counting only the distinct ones).

The product of its digits is 104509440, while the sum is 64.

The spelling of 78385246696 in words is "seventy-eight billion, three hundred eighty-five million, two hundred forty-six thousand, six hundred ninety-six".