78585723008 has 32 divisors (see below), whose sum is σ = 168600382860. Its totient is φ = 36270332928.

The previous prime is 78585722987. The next prime is 78585723019. The reversal of 78585723008 is 80032758587.

It can be written as a sum of positive squares in 2 ways, for example, as 77769592384 + 816130624 = 278872^2 + 28568^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 23611835 + ... + 23615162.

Almost surely, 2^78585723008 is an apocalyptic number.

It is an amenable number.

78585723008 is an abundant number, since it is smaller than the sum of its proper divisors (90014659852).

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

78585723008 is a wasteful number, since it uses less digits than its factorization.

78585723008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47227024 (or 47227012 counting only the distinct ones).

The product of its (nonzero) digits is 3763200, while the sum is 53.

The spelling of 78585723008 in words is "seventy-eight billion, five hundred eighty-five million, seven hundred twenty-three thousand, eight".