78218887666832 has 20 divisors (see below), whose sum is σ = 165326285296176. Its totient is φ = 35554039848480.

The previous prime is 78218887666823. The next prime is 78218887666853. The reversal of 78218887666832 is 23866678881287.

It is a super-3 number, since 3×78218887666832³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222212748878 + ... + 222212749229.

Almost surely, 2^{78218887666832} is an apocalyptic number.

It is an amenable number.

78218887666832 is an abundant number, since it is smaller than the sum of its proper divisors (87107397629344).

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

78218887666832 is a wasteful number, since it uses less digits than its factorization.

78218887666832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444425498126 (or 444425498120 counting only the distinct ones).

The product of its digits is 4161798144, while the sum is 80.

The spelling of 78218887666832 in words is "seventy-eight trillion, two hundred eighteen billion, eight hundred eighty-seven million, six hundred sixty-six thousand, eight hundred thirty-two".