64812240578 has 18 divisors (see below), whose sum is σ = 100472902803. Its totient is φ = 31355361060.

The previous prime is 64812240553. The next prime is 64812240601. The reversal of 64812240578 is 87504221846.

64812240578 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 32406120289 + 32406120289 = 180017^2 + 180017^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=180017.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11158151 + ... + 11163957.

Almost surely, 2^64812240578 is an apocalyptic number.

64812240578 is a deficient number, since it is larger than the sum of its proper divisors (35660662225).

64812240578 is an frugal number, since it uses more digits than its factorization.

64812240578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11678 (or 5840 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 47.

The spelling of 64812240578 in words is "sixty-four billion, eight hundred twelve million, two hundred forty thousand, five hundred seventy-eight".