578215818212 has 6 divisors (see below), whose sum is σ = 1011877681878. Its totient is φ = 289107909104.

The previous prime is 578215818197. The next prime is 578215818217. The reversal of 578215818212 is 212818512875.

It can be written as a sum of positive squares in only one way, i.e., 541660672576 + 36555145636 = 735976^2 + 191194^2 .

It is not an unprimeable number, because it can be changed into a prime (578215818217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72276977273 + ... + 72276977280.

It is an arithmetic number, because the mean of its divisors is an integer number (168646280313).

Almost surely, 2^578215818212 is an apocalyptic number.

It is an amenable number.

578215818212 is a deficient number, since it is larger than the sum of its proper divisors (433661863666).

578215818212 is a wasteful number, since it uses less digits than its factorization.

578215818212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144553954557 (or 144553954555 counting only the distinct ones).

The product of its digits is 716800, while the sum is 50.

The spelling of 578215818212 in words is "five hundred seventy-eight billion, two hundred fifteen million, eight hundred eighteen thousand, two hundred twelve".