1078685805604 has 81 divisors (see below), whose sum is σ = 2204937247219. Its totient is φ = 461303687680.

The previous prime is 1078685805583. The next prime is 1078685805607. The reversal of 1078685805604 is 4065085868701.

The square root of 1078685805604 is 1038598.

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 7709191204 + 1070976614400 = 87802^2 + 1034880^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1078685805607) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 388434264 + ... + 388437040.

Almost surely, 2^{1078685805604} is an apocalyptic number.

1078685805604 is the 1038598-th square number.

It is an amenable number.

1078685805604 is an abundant number, since it is smaller than the sum of its proper divisors (1126251441615).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1078685805604 is an equidigital number, since it uses as much as digits as its factorization.

1078685805604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5614 (or 2807 counting only the distinct ones).

The product of its (nonzero) digits is 12902400, while the sum is 58.

The spelling of 1078685805604 in words is "one trillion, seventy-eight billion, six hundred eighty-five million, eight hundred five thousand, six hundred four".