561416022729 has 21 divisors (see below), whose sum is σ = 841769308029. Its totient is φ = 374263861500.

The previous prime is 561416022721. The next prime is 561416022733. The reversal of 561416022729 is 927220614165.

The square root of 561416022729 is 749277.

It is a perfect power (a square), and thus also a powerful number.

561416022729 is a `hidden beast` number, since 5 + 6 + 1 + 416 + 0 + 227 + 2 + 9 = 666.

It is not a de Polignac number, because 561416022729 - 2³ = 561416022721 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (561416022721) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 20216604 + ... + 20244354.

Almost surely, 2^561416022729 is an apocalyptic number.

561416022729 is the 749277-th square number.

561416022729 is the 374639-th centered octagonal number.

It is an amenable number.

561416022729 is a deficient number, since it is larger than the sum of its proper divisors (280353285300).

561416022729 is an frugal number, since it uses more digits than its factorization.

561416022729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55520 (or 27754 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 561416022729 in words is "five hundred sixty-one billion, four hundred sixteen million, twenty-two thousand, seven hundred twenty-nine".