78163679812 has 12 divisors (see below), whose sum is σ = 136949480640. Its totient is φ = 39035256776.

The previous prime is 78163679809. The next prime is 78163679813. The reversal of 78163679812 is 21897636187.

It is a super-3 number, since 3×78163679812³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (78163679813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11642008 + ... + 11648719.

It is an arithmetic number, because the mean of its divisors is an integer number (11412456720).

Almost surely, 2^78163679812 is an apocalyptic number.

It is an amenable number.

78163679812 is a deficient number, since it is larger than the sum of its proper divisors (58785800828).

78163679812 is a wasteful number, since it uses less digits than its factorization.

78163679812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23291570 (or 23291568 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 58.

The spelling of 78163679812 in words is "seventy-eight billion, one hundred sixty-three million, six hundred seventy-nine thousand, eight hundred twelve".