78183636865378 has 12 divisors (see below), whose sum is σ = 128906078964390. Its totient is φ = 35538016756880.

The previous prime is 78183636865363. The next prime is 78183636865403. The reversal of 78183636865378 is 87356863638187.

It can be written as a sum of positive squares in only one way, i.e., 75408504013249 + 2775132852129 = 8683807^2 + 1665873^2 .

It is a super-2 number, since 2×78183636865378² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78183636865298 and 78183636865307.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 161536439563 + ... + 161536440046.

Almost surely, 2^{78183636865378} is an apocalyptic number.

78183636865378 is a deficient number, since it is larger than the sum of its proper divisors (50722442099012).

78183636865378 is a wasteful number, since it uses less digits than its factorization.

78183636865378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323072879633 (or 323072879622 counting only the distinct ones).

The product of its digits is 5852528640, while the sum is 79.

The spelling of 78183636865378 in words is "seventy-eight trillion, one hundred eighty-three billion, six hundred thirty-six million, eight hundred sixty-five thousand, three hundred seventy-eight".