561727778395 has 8 divisors (see below), whose sum is σ = 770369524704. Its totient is φ = 385184762304.

The previous prime is 561727778393. The next prime is 561727778419. The reversal of 561727778395 is 593877727165.

561727778395 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 561727778395 - 2¹ = 561727778393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 561727778395.

It is not an unprimeable number, because it can be changed into a prime (561727778393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8024682514 + ... + 8024682583.

It is an arithmetic number, because the mean of its divisors is an integer number (96296190588).

Almost surely, 2^561727778395 is an apocalyptic number.

561727778395 is a deficient number, since it is larger than the sum of its proper divisors (208641746309).

561727778395 is a wasteful number, since it uses less digits than its factorization.

561727778395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16049365109.

The product of its digits is 155584800, while the sum is 67.

The spelling of 561727778395 in words is "five hundred sixty-one billion, seven hundred twenty-seven million, seven hundred seventy-eight thousand, three hundred ninety-five".