1566788229361 has 4 divisors (see below), whose sum is σ = 1588251081892. Its totient is φ = 1545325376832.

The previous prime is 1566788229343. The next prime is 1566788229427. The reversal of 1566788229361 is 1639228876651.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 566226150400 + 1000562078961 = 752480^2 + 1000281^2 .

It is a cyclic number.

It is not a de Polignac number, because 1566788229361 - 2¹¹ = 1566788227313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1566788229293 and 1566788229302.

It is not an unprimeable number, because it can be changed into a prime (1566788229341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10731426156 + ... + 10731426301.

It is an arithmetic number, because the mean of its divisors is an integer number (397062770473).

Almost surely, 2^{1566788229361} is an apocalyptic number.

It is an amenable number.

1566788229361 is a deficient number, since it is larger than the sum of its proper divisors (21462852531).

1566788229361 is an equidigital number, since it uses as much as digits as its factorization.

1566788229361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21462852530.

The product of its digits is 52254720, while the sum is 64.

The spelling of 1566788229361 in words is "one trillion, five hundred sixty-six billion, seven hundred eighty-eight million, two hundred twenty-nine thousand, three hundred sixty-one".