678573947536 has 45 divisors (see below), whose sum is σ = 1328534666473. Its totient is φ = 335762945600.

The previous prime is 678573947533. The next prime is 678573947561. The reversal of 678573947536 is 635749375876.

The square root of 678573947536 is 823756.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 651965813136 + 26608134400 = 807444^2 + 163120^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678573947533) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 332796405 + ... + 332798443.

Almost surely, 2^678573947536 is an apocalyptic number.

678573947536 is the 823756-th square number.

It is an amenable number.

678573947536 is a deficient number, since it is larger than the sum of its proper divisors (649960718937).

678573947536 is an frugal number, since it uses more digits than its factorization.

678573947536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4288 (or 2142 counting only the distinct ones).

The product of its digits is 800150400, while the sum is 70.

The spelling of 678573947536 in words is "six hundred seventy-eight billion, five hundred seventy-three million, nine hundred forty-seven thousand, five hundred thirty-six".