78218823363856 has 20 divisors (see below), whose sum is σ = 173198823163072. Its totient is φ = 33522352870176.

The previous prime is 78218823363851. The next prime is 78218823363953. The reversal of 78218823363856 is 65836332881287.

It is a super-2 number, since 2×78218823363856² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78218823363851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 349191175620 + ... + 349191175843.

Almost surely, 2^{78218823363856} is an apocalyptic number.

It is an amenable number.

78218823363856 is an abundant number, since it is smaller than the sum of its proper divisors (94979999799216).

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

78218823363856 is a wasteful number, since it uses less digits than its factorization.

78218823363856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698382351478 (or 698382351472 counting only the distinct ones).

The product of its digits is 557383680, while the sum is 70.

The spelling of 78218823363856 in words is "seventy-eight trillion, two hundred eighteen billion, eight hundred twenty-three million, three hundred sixty-three thousand, eight hundred fifty-six".