78555673 has 12 divisors (see below), whose sum is σ = 91528320. Its totient is φ = 67225032.

The previous prime is 78555647. The next prime is 78555677. The reversal of 78555673 is 37655587.

It is not a de Polignac number, because 78555673 - 2⁵ = 78555641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78555677) 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 11 ways as a sum of consecutive naturals, for example, 50140 + ... + 51682.

It is an arithmetic number, because the mean of its divisors is an integer number (7627360).

Almost surely, 2^78555673 is an apocalyptic number.

It is an amenable number.

78555673 is a deficient number, since it is larger than the sum of its proper divisors (12972647).

78555673 is a wasteful number, since it uses less digits than its factorization.

78555673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2596 (or 2589 counting only the distinct ones).

The product of its digits is 882000, while the sum is 46.

The square root of 78555673 is about 8863.1638256325. The cubic root of 78555673 is about 428.2780841227.

The spelling of 78555673 in words is "seventy-eight million, five hundred fifty-five thousand, six hundred seventy-three".