561255703431521 has 8 divisors (see below), whose sum is σ = 669323571794304. Its totient is φ = 460159955608320.

The previous prime is 561255703431517. The next prime is 561255703431539. The reversal of 561255703431521 is 125134307552165.

It is a happy number.

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 561255703431521 - 2² = 561255703431517 is a prime.

It is a super-2 number, since 2×561255703431521² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 561255703431521.

It is not an unprimeable number, because it can be changed into a prime (561255703431551) 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, 1743030134720 + ... + 1743030135041.

It is an arithmetic number, because the mean of its divisors is an integer number (83665446474288).

Almost surely, 2^{561255703431521} is an apocalyptic number.

It is an amenable number.

561255703431521 is a deficient number, since it is larger than the sum of its proper divisors (108067868362783).

561255703431521 is a wasteful number, since it uses less digits than its factorization.

561255703431521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3486060269791.

The product of its (nonzero) digits is 3780000, while the sum is 50.

The spelling of 561255703431521 in words is "five hundred sixty-one trillion, two hundred fifty-five billion, seven hundred three million, four hundred thirty-one thousand, five hundred twenty-one".