78387638059 has 8 divisors (see below), whose sum is σ = 82600453440. Its totient is φ = 74183537736.

The previous prime is 78387638041. The next prime is 78387638107. The reversal of 78387638059 is 95083678387.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78387638059 - 2²⁷ = 78253420331 is a prime.

It is a super-2 number, since 2×78387638059² (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 (78387638359) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2160289 + ... + 2196274.

It is an arithmetic number, because the mean of its divisors is an integer number (10325056680).

Almost surely, 2^78387638059 is an apocalyptic number.

78387638059 is a deficient number, since it is larger than the sum of its proper divisors (4212815381).

78387638059 is a wasteful number, since it uses less digits than its factorization.

78387638059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4357529.

The product of its (nonzero) digits is 60963840, while the sum is 64.

The spelling of 78387638059 in words is "seventy-eight billion, three hundred eighty-seven million, six hundred thirty-eight thousand, fifty-nine".