78685255612 has 24 divisors (see below), whose sum is σ = 142314002432. Its totient is φ = 38027199600.

The previous prime is 78685255559. The next prime is 78685255619. The reversal of 78685255612 is 21655258687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78685255619) 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, 283464 + ... + 487567.

Almost surely, 2^78685255612 is an apocalyptic number.

It is an amenable number.

78685255612 is a deficient number, since it is larger than the sum of its proper divisors (63628746820).

78685255612 is a wasteful number, since it uses less digits than its factorization.

78685255612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771889 (or 771887 counting only the distinct ones).

The product of its digits is 8064000, while the sum is 55.

The spelling of 78685255612 in words is "seventy-eight billion, six hundred eighty-five million, two hundred fifty-five thousand, six hundred twelve".