561553724029 has 4 divisors (see below), whose sum is σ = 579668360320. Its totient is φ = 543439087740.

The previous prime is 561553724003. The next prime is 561553724041. The reversal of 561553724029 is 920427355165.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 561553724029 - 2³¹ = 559406240381 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 (561553734029) 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, 9057318099 + ... + 9057318160.

It is an arithmetic number, because the mean of its divisors is an integer number (144917090080).

Almost surely, 2^561553724029 is an apocalyptic number.

It is an amenable number.

561553724029 is a deficient number, since it is larger than the sum of its proper divisors (18114636291).

561553724029 is a wasteful number, since it uses less digits than its factorization.

561553724029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18114636290.

The product of its (nonzero) digits is 2268000, while the sum is 49.

The spelling of 561553724029 in words is "five hundred sixty-one billion, five hundred fifty-three million, seven hundred twenty-four thousand, twenty-nine".