56421963013523 has 2 divisors, whose sum is σ = 56421963013524. Its totient is φ = 56421963013522.

The previous prime is 56421963013513. The next prime is 56421963013543. The reversal of 56421963013523 is 32531036912465.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56421963013523 - 2⁶ = 56421963013459 is a prime.

It is a super-2 number, since 2×56421963013523² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56421963013513) 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, 28210981506761 + 28210981506762.

It is an arithmetic number, because the mean of its divisors is an integer number (28210981506762).

Almost surely, 2^{56421963013523} is an apocalyptic number.

56421963013523 is a deficient number, since it is larger than the sum of its proper divisors (1).

56421963013523 is an equidigital number, since it uses as much as digits as its factorization.

56421963013523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3499200, while the sum is 50.

Adding to 56421963013523 its reverse (32531036912465), we get a palindrome (88952999925988).

The spelling of 56421963013523 in words is "fifty-six trillion, four hundred twenty-one billion, nine hundred sixty-three million, thirteen thousand, five hundred twenty-three".