78218656824104 has 16 divisors (see below), whose sum is σ = 147008342552820. Its totient is φ = 39016432143360.

The previous prime is 78218656824083. The next prime is 78218656824149. The reversal of 78218656824104 is 40142865681287.

It can be written as a sum of positive squares in 2 ways, for example, as 62829433956004 + 15389222868100 = 7926502^2 + 3922910^2 .

It is a super-2 number, since 2×78218656824104² (a number of 29 digits) contains 22 as substring.

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, 11612030009 + ... + 11612036744.

Almost surely, 2^{78218656824104} is an apocalyptic number.

It is an amenable number.

78218656824104 is a deficient number, since it is larger than the sum of its proper divisors (68789685728716).

78218656824104 is a wasteful number, since it uses less digits than its factorization.

78218656824104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23224067180 (or 23224067176 counting only the distinct ones).

The product of its (nonzero) digits is 41287680, while the sum is 62.

The spelling of 78218656824104 in words is "seventy-eight trillion, two hundred eighteen billion, six hundred fifty-six million, eight hundred twenty-four thousand, one hundred four".