561205538979 has 8 divisors (see below), whose sum is σ = 750248391360. Its totient is φ = 373149856296.

The previous prime is 561205538963. The next prime is 561205538981. The reversal of 561205538979 is 979835502165.

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

It is not a de Polignac number, because 561205538979 - 2⁴ = 561205538963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561205538939) 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, 246791097 + ... + 246793370.

It is an arithmetic number, because the mean of its divisors is an integer number (93781048920).

Almost surely, 2^561205538979 is an apocalyptic number.

561205538979 is a deficient number, since it is larger than the sum of its proper divisors (189042852381).

561205538979 is a wasteful number, since it uses less digits than its factorization.

561205538979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493584849.

The product of its (nonzero) digits is 20412000, while the sum is 60.

The spelling of 561205538979 in words is "five hundred sixty-one billion, two hundred five million, five hundred thirty-eight thousand, nine hundred seventy-nine".