78465406218 has 32 divisors (see below), whose sum is σ = 165434495040. Its totient is φ = 24741924480.

The previous prime is 78465406211. The next prime is 78465406219. The reversal of 78465406218 is 81260456487.

It is not an unprimeable number, because it can be changed into a prime (78465406211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 431163 + ... + 585518.

It is an arithmetic number, because the mean of its divisors is an integer number (5169827970).

Almost surely, 2^78465406218 is an apocalyptic number.

78465406218 is an abundant number, since it is smaller than the sum of its proper divisors (86969088822).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78465406218 is a wasteful number, since it uses less digits than its factorization.

78465406218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017382.

The product of its (nonzero) digits is 2580480, while the sum is 51.

The spelling of 78465406218 in words is "seventy-eight billion, four hundred sixty-five million, four hundred six thousand, two hundred eighteen".