78507876859 has 4 divisors (see below), whose sum is σ = 79228132720. Its totient is φ = 77787621000.

The previous prime is 78507876841. The next prime is 78507876869. The reversal of 78507876859 is 95867870587.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95867870587 = 7457 ⋅12856091.

It is a cyclic number.

It is not a de Polignac number, because 78507876859 - 2¹³ = 78507868667 is a prime.

It is a super-3 number, since 3×78507876859³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78507876829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360127767 + ... + 360127984.

It is an arithmetic number, because the mean of its divisors is an integer number (19807033180).

Almost surely, 2^78507876859 is an apocalyptic number.

78507876859 is a deficient number, since it is larger than the sum of its proper divisors (720255861).

78507876859 is a wasteful number, since it uses less digits than its factorization.

78507876859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720255860.

The product of its (nonzero) digits is 237081600, while the sum is 70.

The spelling of 78507876859 in words is "seventy-eight billion, five hundred seven million, eight hundred seventy-six thousand, eight hundred fifty-nine".