78975813218 has 8 divisors (see below), whose sum is σ = 122285130240. Its totient is φ = 38214103140.

The previous prime is 78975813157. The next prime is 78975813221. The reversal of 78975813218 is 81231857987.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 636901658 + ... + 636901781.

It is an arithmetic number, because the mean of its divisors is an integer number (15285641280).

Almost surely, 2^78975813218 is an apocalyptic number.

78975813218 is a deficient number, since it is larger than the sum of its proper divisors (43309317022).

78975813218 is a wasteful number, since it uses less digits than its factorization.

78975813218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273803472.

The product of its digits is 6773760, while the sum is 59.

The spelling of 78975813218 in words is "seventy-eight billion, nine hundred seventy-five million, eight hundred thirteen thousand, two hundred eighteen".