56251613563 has 2 divisors, whose sum is σ = 56251613564. Its totient is φ = 56251613562.

The previous prime is 56251613491. The next prime is 56251613591. The reversal of 56251613563 is 36531615265.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56251613563 is a prime.

It is a super-3 number, since 3×56251613563³ (a number of 33 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (56251613063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28125806781 + 28125806782.

It is an arithmetic number, because the mean of its divisors is an integer number (28125806782).

Almost surely, 2^56251613563 is an apocalyptic number.

56251613563 is a deficient number, since it is larger than the sum of its proper divisors (1).

56251613563 is an equidigital number, since it uses as much as digits as its factorization.

56251613563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 486000, while the sum is 43.

The spelling of 56251613563 in words is "fifty-six billion, two hundred fifty-one million, six hundred thirteen thousand, five hundred sixty-three".