78145966116 has 27 divisors (see below), whose sum is σ = 197539876443. Its totient is φ = 26048096280.

The previous prime is 78145966111. The next prime is 78145966141. The reversal of 78145966116 is 61166954187.

The square root of 78145966116 is 279546.

It is a perfect power (a square), and thus also a powerful number.

78145966116 is a `hidden beast` number, since 7 + 8 + 14 + 5 + 9 + 6 + 611 + 6 = 666.

It is a super-2 number, since 2×78145966116² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78145966111) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1653981 + ... + 1700571.

Almost surely, 2^78145966116 is an apocalyptic number.

78145966116 is the 279546-th square number.

It is an amenable number.

78145966116 is an abundant number, since it is smaller than the sum of its proper divisors (119393910327).

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

78145966116 is an frugal number, since it uses more digits than its factorization.

78145966116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93192 (or 46596 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The spelling of 78145966116 in words is "seventy-eight billion, one hundred forty-five million, nine hundred sixty-six thousand, one hundred sixteen".