561798327651 has 8 divisors (see below), whose sum is σ = 817161203904. Its totient is φ = 340483834920.

The previous prime is 561798327637. The next prime is 561798327677. The reversal of 561798327651 is 156723897165.

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

It is not a de Polignac number, because 561798327651 - 2¹⁰ = 561798326627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561798327631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8512095841 + ... + 8512095906.

It is an arithmetic number, because the mean of its divisors is an integer number (102145150488).

Almost surely, 2^561798327651 is an apocalyptic number.

561798327651 is a deficient number, since it is larger than the sum of its proper divisors (255362876253).

561798327651 is a wasteful number, since it uses less digits than its factorization.

561798327651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17024191761.

The product of its digits is 19051200, while the sum is 60.

The spelling of 561798327651 in words is "five hundred sixty-one billion, seven hundred ninety-eight million, three hundred twenty-seven thousand, six hundred fifty-one".