78451445187 has 8 divisors (see below), whose sum is σ = 116224363280. Its totient is φ = 52300963440.

The previous prime is 78451445179. The next prime is 78451445207. The reversal of 78451445187 is 78154415487.

It is a happy number.

78451445187 is a `hidden beast` number, since 7 + 8 + 4 + 514 + 45 + 1 + 87 = 666.

It is not a de Polignac number, because 78451445187 - 2³ = 78451445179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78451445587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1452804514 + ... + 1452804567.

It is an arithmetic number, because the mean of its divisors is an integer number (14528045410).

Almost surely, 2^78451445187 is an apocalyptic number.

78451445187 is a deficient number, since it is larger than the sum of its proper divisors (37772918093).

78451445187 is a wasteful number, since it uses less digits than its factorization.

78451445187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2905609090 (or 2905609084 counting only the distinct ones).

The product of its digits is 5017600, while the sum is 54.

The spelling of 78451445187 in words is "seventy-eight billion, four hundred fifty-one million, four hundred forty-five thousand, one hundred eighty-seven".