561897782053 has 8 divisors (see below), whose sum is σ = 596716030872. Its totient is φ = 527275693056.

The previous prime is 561897782029. The next prime is 561897782057. The reversal of 561897782053 is 350287798165.

It can be written as a sum of positive squares in 4 ways, for example, as 9435596769 + 552462185284 = 97137^2 + 743278^2 .

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 561897782053 - 2¹³ = 561897773861 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 561897781982 and 561897782000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561897782057) 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, 49034050 + ... + 49045507.

It is an arithmetic number, because the mean of its divisors is an integer number (74589503859).

Almost surely, 2^561897782053 is an apocalyptic number.

It is an amenable number.

561897782053 is a deficient number, since it is larger than the sum of its proper divisors (34818248819).

561897782053 is a wasteful number, since it uses less digits than its factorization.

561897782053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98079911.

The product of its (nonzero) digits is 25401600, while the sum is 61.

The spelling of 561897782053 in words is "five hundred sixty-one billion, eight hundred ninety-seven million, seven hundred eighty-two thousand, fifty-three".