561734455679 has 4 divisors (see below), whose sum is σ = 561763369440. Its totient is φ = 561705541920.

The previous prime is 561734455673. The next prime is 561734455691. The reversal of 561734455679 is 976554437165.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 976554437165 = 5 ⋅195310887433.

It is a cyclic number.

It is not a de Polignac number, because 561734455679 - 2⁸ = 561734455423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561734455673) 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, 14427719 + ... + 14466600.

It is an arithmetic number, because the mean of its divisors is an integer number (140440842360).

Almost surely, 2^561734455679 is an apocalyptic number.

561734455679 is a deficient number, since it is larger than the sum of its proper divisors (28913761).

561734455679 is a wasteful number, since it uses less digits than its factorization.

561734455679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28913760.

The product of its digits is 95256000, while the sum is 62.

The spelling of 561734455679 in words is "five hundred sixty-one billion, seven hundred thirty-four million, four hundred fifty-five thousand, six hundred seventy-nine".