78445338273 has 32 divisors (see below), whose sum is σ = 120056299520. Its totient is φ = 50571041040.

The previous prime is 78445338199. The next prime is 78445338281. The reversal of 78445338273 is 37283354487.

78445338273 is a `hidden beast` number, since 7 + 84 + 4 + 533 + 8 + 27 + 3 = 666.

It is not a de Polignac number, because 78445338273 - 2⁸ = 78445338017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78445338073) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1075386 + ... + 1146012.

It is an arithmetic number, because the mean of its divisors is an integer number (3751759360).

Almost surely, 2^78445338273 is an apocalyptic number.

It is an amenable number.

78445338273 is a deficient number, since it is larger than the sum of its proper divisors (41610961247).

78445338273 is a wasteful number, since it uses less digits than its factorization.

78445338273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71994 (or 71988 counting only the distinct ones).

The product of its digits is 13547520, while the sum is 54.

The spelling of 78445338273 in words is "seventy-eight billion, four hundred forty-five million, three hundred thirty-eight thousand, two hundred seventy-three".