1200812705856 has 63 divisors (see below), whose sum is σ = 3441988192591. Its totient is φ = 400262135424.

The previous prime is 1200812705809. The next prime is 1200812705881. The reversal of 1200812705856 is 6585072180021.

The square root of 1200812705856 is 1095816.

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

1200812705856 is a `hidden beast` number, since 1 + 200 + 81 + 270 + 58 + 56 = 666.

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, 26276755 + ... + 26322413.

Almost surely, 2^{1200812705856} is an apocalyptic number.

1200812705856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1200812705856 is the 1095816-th square number.

It is an amenable number.

1200812705856 is an abundant number, since it is smaller than the sum of its proper divisors (2241175486735).

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

1200812705856 is an frugal number, since it uses more digits than its factorization.

1200812705856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91336 (or 45664 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 45.

Adding to 1200812705856 its reverse (6585072180021), we get a palindrome (7785884885877).

The spelling of 1200812705856 in words is "one trillion, two hundred billion, eight hundred twelve million, seven hundred five thousand, eight hundred fifty-six".