561010610556 has 36 divisors (see below), whose sum is σ = 1547029260504. Its totient is φ = 170003215200.

The previous prime is 561010610551. The next prime is 561010610621. The reversal of 561010610556 is 655016010165.

561010610556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 561010610556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561010610551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 708346335 + ... + 708347126.

It is an arithmetic number, because the mean of its divisors is an integer number (42973035014).

Almost surely, 2^561010610556 is an apocalyptic number.

It is an amenable number.

561010610556 is an abundant number, since it is smaller than the sum of its proper divisors (986018649948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561010610556 is a wasteful number, since it uses less digits than its factorization.

561010610556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416693482 (or 1416693477 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

Subtracting 561010610556 from its reverse (655016010165), we obtain a square (94005399609 = 306603²).

The spelling of 561010610556 in words is "five hundred sixty-one billion, ten million, six hundred ten thousand, five hundred fifty-six".