561226505772 has 24 divisors (see below), whose sum is σ = 1339982666176. Its totient is φ = 182724908688.

The previous prime is 561226505759. The next prime is 561226505789. The reversal of 561226505772 is 277505622165.

561226505772 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 543823618 + ... + 543824649.

Almost surely, 2^561226505772 is an apocalyptic number.

It is an amenable number.

561226505772 is an abundant number, since it is smaller than the sum of its proper divisors (778756160404).

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

561226505772 is a wasteful number, since it uses less digits than its factorization.

561226505772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087648317 (or 1087648315 counting only the distinct ones).

The product of its (nonzero) digits is 1764000, while the sum is 48.

The spelling of 561226505772 in words is "five hundred sixty-one billion, two hundred twenty-six million, five hundred five thousand, seven hundred seventy-two".