578390994722 has 6 divisors (see below), whose sum is σ = 867588105393. Its totient is φ = 289194959592.

The previous prime is 578390994721. The next prime is 578390994733. The reversal of 578390994722 is 227499093875.

It can be written as a sum of positive squares in 2 ways, for example, as 303690268561 + 274700726161 = 551081^2 + 524119^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=537769.

It is a super-2 number, since 2×578390994722² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (578390994721) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 806654 + ... + 1344422.

Almost surely, 2^578390994722 is an apocalyptic number.

578390994722 is a deficient number, since it is larger than the sum of its proper divisors (289197110671).

578390994722 is an frugal number, since it uses more digits than its factorization.

578390994722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075540 (or 537771 counting only the distinct ones).

The product of its (nonzero) digits is 68584320, while the sum is 65.

The spelling of 578390994722 in words is "five hundred seventy-eight billion, three hundred ninety million, nine hundred ninety-four thousand, seven hundred twenty-two".