1561066519743 has 16 divisors (see below), whose sum is σ = 2312730048000. Its totient is φ = 1040693504760.

The previous prime is 1561066519709. The next prime is 1561066519751. The reversal of 1561066519743 is 3479156601651.

1561066519743 is a `hidden beast` number, since 1 + 5 + 61 + 0 + 66 + 519 + 7 + 4 + 3 = 666.

It is not a de Polignac number, because 1561066519743 - 2⁶ = 1561066519679 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1561066519743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561066519843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1262628 + ... + 2171718.

It is an arithmetic number, because the mean of its divisors is an integer number (144545628000).

Almost surely, 2^{1561066519743} is an apocalyptic number.

1561066519743 is a deficient number, since it is larger than the sum of its proper divisors (751663528257).

1561066519743 is an equidigital number, since it uses as much as digits as its factorization.

1561066519743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972699 (or 972693 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 54.

The spelling of 1561066519743 in words is "one trillion, five hundred sixty-one billion, sixty-six million, five hundred nineteen thousand, seven hundred forty-three".