63073725612561 has 6 divisors (see below), whose sum is σ = 91106492551490. Its totient is φ = 42049150408368.

The previous prime is 63073725612553. The next prime is 63073725612563. The reversal of 63073725612561 is 16521652737036.

63073725612561 is a `hidden beast` number, since 6 + 3 + 0 + 7 + 3 + 72 + 5 + 6 + 1 + 2 + 561 = 666.

It can be written as a sum of positive squares in only one way, i.e., 44858917382400 + 18214808230161 = 6697680^2 + 4267881^2 .

It is not a de Polignac number, because 63073725612561 - 2³ = 63073725612553 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 63073725612498 and 63073725612507.

It is not an unprimeable number, because it can be changed into a prime (63073725612563) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3504095867356 + ... + 3504095867373.

Almost surely, 2^{63073725612561} is an apocalyptic number.

It is an amenable number.

63073725612561 is a deficient number, since it is larger than the sum of its proper divisors (28032766938929).

63073725612561 is a wasteful number, since it uses less digits than its factorization.

63073725612561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7008191734735 (or 7008191734732 counting only the distinct ones).

The product of its (nonzero) digits is 9525600, while the sum is 54.

The spelling of 63073725612561 in words is "sixty-three trillion, seventy-three billion, seven hundred twenty-five million, six hundred twelve thousand, five hundred sixty-one".