78461608212 has 72 divisors (see below), whose sum is σ = 215549614280. Its totient is φ = 23920531200.

The previous prime is 78461608207. The next prime is 78461608241. The reversal of 78461608212 is 21280616487.

78461608212 is a `hidden beast` number, since 7 + 8 + 4 + 616 + 0 + 8 + 21 + 2 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 104162436 + 78357445776 = 10206^2 + 279924^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 718039 + ... + 820062.

Almost surely, 2^78461608212 is an apocalyptic number.

It is an amenable number.

78461608212 is an abundant number, since it is smaller than the sum of its proper divisors (137088006068).

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

78461608212 is a wasteful number, since it uses less digits than its factorization.

78461608212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538233 (or 1538228 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The spelling of 78461608212 in words is "seventy-eight billion, four hundred sixty-one million, six hundred eight thousand, two hundred twelve".