561557116347 has 8 divisors (see below), whose sum is σ = 748748332560. Its totient is φ = 374368655520.

The previous prime is 561557116327. The next prime is 561557116361. The reversal of 561557116347 is 743611755165.

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

It is not a de Polignac number, because 561557116347 - 2¹² = 561557112251 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 561557116347.

It is not an unprimeable number, because it can be changed into a prime (561557116327) 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 7 ways as a sum of consecutive naturals, for example, 153972 + ... + 1070897.

It is an arithmetic number, because the mean of its divisors is an integer number (93593541570).

Almost surely, 2^561557116347 is an apocalyptic number.

561557116347 is a deficient number, since it is larger than the sum of its proper divisors (187191216213).

561557116347 is a wasteful number, since it uses less digits than its factorization.

561557116347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377693.

The product of its digits is 2646000, while the sum is 51.

The spelling of 561557116347 in words is "five hundred sixty-one billion, five hundred fifty-seven million, one hundred sixteen thousand, three hundred forty-seven".