56421963021727 has 2 divisors, whose sum is σ = 56421963021728. Its totient is φ = 56421963021726.

The previous prime is 56421963021703. The next prime is 56421963021763. The reversal of 56421963021727 is 72712036912465.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56421963021727 - 2¹¹ = 56421963019679 is a prime.

It is a super-2 number, since 2×56421963021727² (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 (56421963028727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28210981510863 + 28210981510864.

It is an arithmetic number, because the mean of its divisors is an integer number (28210981510864).

Almost surely, 2^{56421963021727} is an apocalyptic number.

56421963021727 is a deficient number, since it is larger than the sum of its proper divisors (1).

56421963021727 is an equidigital number, since it uses as much as digits as its factorization.

56421963021727 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7620480, while the sum is 55.

The spelling of 56421963021727 in words is "fifty-six trillion, four hundred twenty-one billion, nine hundred sixty-three million, twenty-one thousand, seven hundred twenty-seven".