56478421723 has 2 divisors, whose sum is σ = 56478421724. Its totient is φ = 56478421722.

The previous prime is 56478421697. The next prime is 56478421729. The reversal of 56478421723 is 32712487465.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56478421723 - 2³³ = 47888487131 is a prime.

It is not a weakly prime, because it can be changed into another prime (56478421729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28239210861 + 28239210862.

It is an arithmetic number, because the mean of its divisors is an integer number (28239210862).

Almost surely, 2^56478421723 is an apocalyptic number.

56478421723 is a deficient number, since it is larger than the sum of its proper divisors (1).

56478421723 is an equidigital number, since it uses as much as digits as its factorization.

56478421723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2257920, while the sum is 49.

The spelling of 56478421723 in words is "fifty-six billion, four hundred seventy-eight million, four hundred twenty-one thousand, seven hundred twenty-three".