56553266235551 has 2 divisors, whose sum is σ = 56553266235552. Its totient is φ = 56553266235550.

The previous prime is 56553266235523. The next prime is 56553266235611. The reversal of 56553266235551 is 15553266235565.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56553266235551 is a prime.

It is a super-2 number, since 2×56553266235551² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56553266237551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28276633117775 + 28276633117776.

It is an arithmetic number, because the mean of its divisors is an integer number (28276633117776).

Almost surely, 2^{56553266235551} is an apocalyptic number.

56553266235551 is a deficient number, since it is larger than the sum of its proper divisors (1).

56553266235551 is an equidigital number, since it uses as much as digits as its factorization.

56553266235551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 121500000, while the sum is 59.

The spelling of 56553266235551 in words is "fifty-six trillion, five hundred fifty-three billion, two hundred sixty-six million, two hundred thirty-five thousand, five hundred fifty-one".