78120659907 has 6 divisors (see below), whose sum is σ = 112840953212. Its totient is φ = 52080439932.

The previous prime is 78120659893. The next prime is 78120659941. The reversal of 78120659907 is 70995602187.

It is not a de Polignac number, because 78120659907 - 2²³ = 78112271299 is a prime.

It is a super-2 number, since 2×78120659907² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78120659107) 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 5 ways as a sum of consecutive naturals, for example, 4340036653 + ... + 4340036670.

Almost surely, 2^78120659907 is an apocalyptic number.

78120659907 is a deficient number, since it is larger than the sum of its proper divisors (34720293305).

78120659907 is a wasteful number, since it uses less digits than its factorization.

78120659907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8680073329 (or 8680073326 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 54.

The spelling of 78120659907 in words is "seventy-eight billion, one hundred twenty million, six hundred fifty-nine thousand, nine hundred seven".