678060021136 has 45 divisors (see below), whose sum is σ = 1346833525219. Its totient is φ = 330695110400.

The previous prime is 678060021071. The next prime is 678060021227. The reversal of 678060021136 is 631120060876.

It is a happy number.

The square root of 678060021136 is 823444.

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

It can be written as a sum of positive squares in 4 ways, for example, as 5528814736 + 672531206400 = 74356^2 + 820080^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 135042306 + ... + 135047326.

Almost surely, 2^678060021136 is an apocalyptic number.

678060021136 is the 823444-th square number.

It is an amenable number.

678060021136 is a deficient number, since it is larger than the sum of its proper divisors (668773504083).

678060021136 is an frugal number, since it uses more digits than its factorization.

678060021136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10132 (or 5064 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 678060021136 in words is "six hundred seventy-eight billion, sixty million, twenty-one thousand, one hundred thirty-six".