78445474167 has 4 divisors (see below), whose sum is σ = 104593965560. Its totient is φ = 52296982776.

The previous prime is 78445474157. The next prime is 78445474171. The reversal of 78445474167 is 76147454487.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 78445474167 - 2¹⁸ = 78445212023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78445474117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13074245692 + ... + 13074245697.

It is an arithmetic number, because the mean of its divisors is an integer number (26148491390).

Almost surely, 2^78445474167 is an apocalyptic number.

78445474167 is a deficient number, since it is larger than the sum of its proper divisors (26148491393).

78445474167 is a wasteful number, since it uses less digits than its factorization.

78445474167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26148491392.

The product of its digits is 21073920, while the sum is 57.

The spelling of 78445474167 in words is "seventy-eight billion, four hundred forty-five million, four hundred seventy-four thousand, one hundred sixty-seven".