1080208927561 has 9 divisors (see below), whose sum is σ = 1118773161831. Its totient is φ = 1042931242584.

The previous prime is 1080208927547. The next prime is 1080208927571. The reversal of 1080208927561 is 1657298020801.

It is a happy number.

The square root of 1080208927561 is 1039331.

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

1080208927561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 566435359161 + 513773568400 = 752619^2 + 716780^2 .

It is not a de Polignac number, because 1080208927561 - 2²⁵ = 1080175373129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1080208927571) 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, 30122680 + ... + 30158518.

Almost surely, 2^{1080208927561} is an apocalyptic number.

1080208927561 is the 1039331-st square number.

1080208927561 is the 519666-th centered octagonal number.

It is an amenable number.

1080208927561 is a deficient number, since it is larger than the sum of its proper divisors (38564234270).

1080208927561 is an frugal number, since it uses more digits than its factorization.

1080208927561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71736 (or 35868 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 49.

Multiplying 1080208927561 by its sum of digits (49), we get a square (52930237450489 = 7275317²).

The spelling of 1080208927561 in words is "one trillion, eighty billion, two hundred eight million, nine hundred twenty-seven thousand, five hundred sixty-one".