78384039112 has 32 divisors (see below), whose sum is σ = 150594859800. Its totient is φ = 38225920000.

The previous prime is 78384039109. The next prime is 78384039113. The reversal of 78384039112 is 21193048387.

It can be written as a sum of positive squares in 4 ways, for example, as 23203210276 + 55180828836 = 152326^2 + 234906^2 .

It is a super-2 number, since 2×78384039112² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78384039113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1282464 + ... + 1342192.

Almost surely, 2^78384039112 is an apocalyptic number.

It is an amenable number.

78384039112 is a deficient number, since it is larger than the sum of its proper divisors (72210820688).

78384039112 is a wasteful number, since it uses less digits than its factorization.

78384039112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63777 (or 63773 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 78384039112 in words is "seventy-eight billion, three hundred eighty-four million, thirty-nine thousand, one hundred twelve".