489138491578 has 16 divisors (see below), whose sum is σ = 800628283296. Its totient is φ = 222274610640.

The previous prime is 489138491507. The next prime is 489138491581. The reversal of 489138491578 is 875194831984.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2971401 + ... + 3131692.

It is an arithmetic number, because the mean of its divisors is an integer number (50039267706).

Almost surely, 2^489138491578 is an apocalyptic number.

489138491578 is a deficient number, since it is larger than the sum of its proper divisors (311489791718).

489138491578 is a wasteful number, since it uses less digits than its factorization.

489138491578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6106749.

The product of its digits is 69672960, while the sum is 67.

The spelling of 489138491578 in words is "four hundred eighty-nine billion, one hundred thirty-eight million, four hundred ninety-one thousand, five hundred seventy-eight".