78654891012 has 12 divisors (see below), whose sum is σ = 183528079056. Its totient is φ = 26218297000.

The previous prime is 78654891001. The next prime is 78654891031. The reversal of 78654891012 is 21019845687.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3277287114 + ... + 3277287137.

It is an arithmetic number, because the mean of its divisors is an integer number (15294006588).

Almost surely, 2^78654891012 is an apocalyptic number.

It is an amenable number.

78654891012 is an abundant number, since it is smaller than the sum of its proper divisors (104873188044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78654891012 is a wasteful number, since it uses less digits than its factorization.

78654891012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6554574258 (or 6554574256 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 51.

The spelling of 78654891012 in words is "seventy-eight billion, six hundred fifty-four million, eight hundred ninety-one thousand, twelve".