396084509578 has 4 divisors (see below), whose sum is σ = 594126764370. Its totient is φ = 198042254788.

The previous prime is 396084509521. The next prime is 396084509609. The reversal of 396084509578 is 875905480693.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 875905480693 = 3607 ⋅242834899.

It can be written as a sum of positive squares in only one way, i.e., 323348037769 + 72736471809 = 568637^2 + 269697^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99021127393 + ... + 99021127396.

Almost surely, 2^396084509578 is an apocalyptic number.

396084509578 is a deficient number, since it is larger than the sum of its proper divisors (198042254792).

396084509578 is a wasteful number, since it uses less digits than its factorization.

396084509578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198042254791.

The product of its (nonzero) digits is 65318400, while the sum is 64.

The spelling of 396084509578 in words is "three hundred ninety-six billion, eighty-four million, five hundred nine thousand, five hundred seventy-eight".