56653561 has 2 divisors, whose sum is σ = 56653562. Its totient is φ = 56653560.

The previous prime is 56653547. The next prime is 56653579. The reversal of 56653561 is 16535665.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38675961 + 17977600 = 6219^2 + 4240^2 .

It is a cyclic number.

It is not a de Polignac number, because 56653561 - 2⁷ = 56653433 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56653561.

It is not a weakly prime, because it can be changed into another prime (56653591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28326780 + 28326781.

It is an arithmetic number, because the mean of its divisors is an integer number (28326781).

Almost surely, 2^56653561 is an apocalyptic number.

It is an amenable number.

56653561 is a deficient number, since it is larger than the sum of its proper divisors (1).

56653561 is an equidigital number, since it uses as much as digits as its factorization.

56653561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81000, while the sum is 37.

The square root of 56653561 is about 7526.8559837425. The cubic root of 56653561 is about 384.0688375759.

It can be divided in two parts, 5 and 6653561, that added together give a palindrome (6653566).

The spelling of 56653561 in words is "fifty-six million, six hundred fifty-three thousand, five hundred sixty-one".