78851438166 has 16 divisors (see below), whose sum is σ = 158043492864. Its totient is φ = 26227043304.

The previous prime is 78851438123. The next prime is 78851438201. The reversal of 78851438166 is 66183415887.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14189346 + ... + 14194901.

It is an arithmetic number, because the mean of its divisors is an integer number (9877718304).

Almost surely, 2^78851438166 is an apocalyptic number.

78851438166 is an abundant number, since it is smaller than the sum of its proper divisors (79192054698).

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

78851438166 is a wasteful number, since it uses less digits than its factorization.

78851438166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28384715.

The product of its digits is 7741440, while the sum is 57.

The spelling of 78851438166 in words is "seventy-eight billion, eight hundred fifty-one million, four hundred thirty-eight thousand, one hundred sixty-six".