78102355112 has 32 divisors (see below), whose sum is σ = 147853549800. Its totient is φ = 38675073024.

The previous prime is 78102355099. The next prime is 78102355117. The reversal of 78102355112 is 21155320187.

It can be written as a sum of positive squares in 4 ways, for example, as 64695957316 + 13406397796 = 254354^2 + 115786^2 .

It is not an unprimeable number, because it can be changed into a prime (78102355117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1983488 + ... + 2022480.

Almost surely, 2^78102355112 is an apocalyptic number.

It is an amenable number.

78102355112 is a deficient number, since it is larger than the sum of its proper divisors (69751194688).

78102355112 is a wasteful number, since it uses less digits than its factorization.

78102355112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41405 (or 41401 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 35.

Adding to 78102355112 its reverse (21155320187), we get a palindrome (99257675299).

The spelling of 78102355112 in words is "seventy-eight billion, one hundred two million, three hundred fifty-five thousand, one hundred twelve".