78212116204 has 24 divisors (see below), whose sum is σ = 137095646688. Its totient is φ = 39041975040.

The previous prime is 78212116187. The next prime is 78212116207. The reversal of 78212116204 is 40261121287.

It is a super-2 number, since 2×78212116204² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78212116204.

It is not an unprimeable number, because it can be changed into a prime (78212116207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12378054 + ... + 12384370.

It is an arithmetic number, because the mean of its divisors is an integer number (5712318612).

Almost surely, 2^78212116204 is an apocalyptic number.

It is an amenable number.

78212116204 is a deficient number, since it is larger than the sum of its proper divisors (58883530484).

78212116204 is a wasteful number, since it uses less digits than its factorization.

78212116204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10905 (or 10903 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The spelling of 78212116204 in words is "seventy-eight billion, two hundred twelve million, one hundred sixteen thousand, two hundred four".